> “Other manufacturers have onsite repair” who does that nowadays and how accessible are their stores?

At least Lenovo offers that in some of their models, you may be charged extra, though, if you want onsite warranty, may depend on market. This summer my space bar started to misbehave, created a ticket on Lenovo site, next day a guy arrived to my home and spend about half an hour to disassemble my laptop and replace the keyboard.

No, I am not envious on your repair experience.