I think you need a reset in terms of realistic expectation of the reliability of ANY vehicle, Toyota/Lexus LC/GX included. They ALL have flaws, some fatal, some expensive, some not. Some individual vehicle have them, some don't. It's all a numbers game.
Each Land Cruiser series had its share of fatal flaws that would leave you stranded and could be VERY expensive.
- 100 Series just to name a few, ignition cylinder breaking (leaves you stranded requires tow), complete transmission failure (leaves you stranded), heater T's (cheap part, one of the (very) few ways to kill the engine), Touch screen failures killing HVAC, brake master cylinder failure leading to loss of stopping power while in motion, etc.
- 80 series = PHH, overheats at the drop of a hat, driveshaft vibes, birfield joints, etc.
- 60 series = power steering pump leaks onto air pump, kills bearing, seizes main drive belt, etc.
They ALL have issues. Toyota/Lexus typically just have them at MUCH lower rates than the competition driving a perceived (and actual) higher reliability rate. Note, this is different than "problem free" which is rarely a reality.
Here's an assessment of the 100 Series transmission failures I put together -
2000 Trans Status 2011 Update - https://forum.ih8mud.com/threads/2000-trans-status-2011-update.501772/page-2#post-6822293
Still, even with their (relatively rare) warts, I'd take a LC/GX any day over the competition, but an expectation of a "trouble free" car at the individual level is just a fantasy.