If we dare to compare Lexus reliability to BMW then any warranty is great whatever it contains. Leaving German garbage aside, I think relax warranty it’s worth only if we compare parts/labour to dealer prices.
If we use competent mechanic like I recently did for my ISF then I cannot justify Lexus product.
Also when I had RCF and serviced it at Lexus Cardiff, some small issues arised during my ownership (2 years).They did everything they could to fob me off every single time I complained about something.
Fox example, I had a small issue with seat sensor, they blamed I must have driven car with open door. That was disgusting 🤮