Cars were always simple(ish) if you knew what you are doing..... they sort of got "complicated" when electronic ignition and coil packs started then ABS etc....so drivers got spooked about them being complicated, which was of course fuelled by Garages promoting the fear factor.....
Drivers also had more £££'s in the late 90's/ 2000's before the neo liberal governments & Banks mess up in 2008...... so were "happy" to trust their dealer for service.....the little bloke in the trade suffered badly..... the dealers took on young oiks who were trained as technicians in the corporate manner....to change expensive parts rather than small repairs.....
The Old School spanners started to collect tools like diagnostic kit on the cheap..... plus many customers who's cars the dealer did not want to service as they were more than 3 years old (yes it did happen)......
Cars now have simplified once again.....BUT with huge amounts of sensors on them.... and in the main.... if they develop a fault... it's a sensor.... or a worn bush other than service consumables like brakes etc.
I agree with Dave..... Bongo's are simple to work on.... believe me.... but that applies to most Japanese metal... they keep it simple and well engineered,sometimes too well engineered.....
If you want complicated..... rear bushes on BMW's ..... and costly too.... and the BMW Mini...... Rear suspension arms....very dodgy as they bend with age...
More folks now are "having a go" again at DIY due to the shortage of cashflow.... but there are many who still want the dodges....there are "mechanics" who are armed with a code scanner who turn off MIL, Air bag and other warning lights for £30 a pop....and drivers thinking they have gotten away with a service cut or MOT failure....
The times a friend of one of my classic customers or regulars happens to have a warning light on......and "do I think I can help".... many have been to "Scanner Sam" for a light to be turned off at £30 and then it comes back in 2 weeks.....or less.... One recent had the Management Light on.... paid his £30... came on again... I was asked to take a look.... I scanned... found what I suspected along with his rough running and fuel consumption up symptoms ( coolant temp sensor - common problem) ... £15 for the sensor... 5 mins work... he went away.... £30 lighter but with a fixed motor... for him result, me a new customer.....
If anyone wants to DIY then I agree with Dave too..... good tools....BUT you don't need to break the bank to pay for them.... Good axle stands like the 3 ton ones by Clarke

and an aldi/lidl jack will get you started.... and for other tools the Aldi/ Lidl sockets sets take some beating.... Gedore quality for Kamasa prices.... the Lidl ones are six sided sockets too...and tested to GS(VPA)..... to destruction and to get that "ticket" is no mean feat.
Also if anyone want's to DIY too..... prepare well before you do the job....and ASK for tips etc.... and on reassembly ...... go the extra mile and use copper grease on nuts and bolts...when an MOT tester sees traces of copper grease he knows the vehicle is cared for and attention to detail has been paid....

Last tip...... use Motor Factors/Trade Counters... they deal with the public, most can get Blueprint brand parts for Jap motors.... and will do you prices to make you smile....quick example .... Astra 1.6 oil filter... £1.81 +vat - £2.17... avoid Halfords unless your buying cleaning products...
dave_aber wrote:IMO it's gone full circle;
1. Cars were simple, everyone knew how to fix them, and did.
2. Cars got complicated, only garages with trained mechanics knew how to fix them.
3. Cars got more complicated, only the main dealer and a computer could diagnose & fix them.
4. "Mechanics" got simpler, turning into monkeys with a toolkit. Owners started paying over the odds to "train" these monkeys to learn about their cars.
5. Diagnostic & maintenance equipment got cheaper (VAGCOM is about £10 these days on eBay), owners started learning how to DIY again.
6. Complicated cars are really still simple, owners can fix their own. (and for the most part, Bongos are REALLY simple to work on)
As an example, I swapped my exhaust in under an hour with a £100 trolley jack, a pair of axle stands, a grinder and a socket set. I'd have paid around the same in labour charges as these (re-usable) tools cost me. The axle stands & grinder I have had for about 15 years, the socket set about 30 years.