This is something I looked at hard when I took the leap this week and ordered the 2023 GX460.
Comparing Ford and Lexus is not a good comparison but any twin turbo motor is a lot more complicated than a naturally aspirated motor (N/A). And the GX460 has a very fine N/A motor, one of the best Toyota makes. Than you look at direct injection with port injection. The direct injection proved to be a disaster and high maintenance. Adding part time port injection just kicks the can down the road. Say instead of 60,000 miles needing an expensive repair, it might now be 120,000 but you will still need to do the repair. Turbo charging is a wonderful thing but better on a diesel motor. One issue is gasoline is not that easy to pressurize, gasoline does not have lubrication built in for one thing where diesel does have some lubrication built in. The HP injection pumps are pretty expensive to replace.
Another thing these days is your seeing a cooling system that almost has it's own computer. The cooling system is sending coolant to various places in the motor at various times, like startup. This is not a simple system and is a new system that could prove to have problems down the road. Same for the oiling system, the modern motors have a variable pressure/volume oil system and it is pretty complicated compared to the old systems. Most motors fail because the (lazy) owners did not check the oil so imagine a system like this with the average owner. And all this is done to save (say?) 1/2 a MPG. Seems like a lot of trouble for not much gain.
The new transmissions are another situation. As far as I know GM and Ford are on the outs due to their 10 speed transmission joint venture. New GM trucks are running 6 speeds I guess until GM sorts this out. The new Ford transmission learns how you drive and adjusts itself to your driving style. So my wife has a totally different driving style than I do, how does this transmission learn and adapt to me and my wife?
And the above is just touching the surface of these modern vehicles. You have hybreds thrown into the mix as well with all the battery and other issues they will present. I know Toyota is one of the leaders in hybred technology.