Why do people still recommend Thinkpads for Linux when there are Linux-oriented manufacturers now?

I've noticed in the Linux community whenever someone asks for a recommendation on a laptop that runs Linux the answer is always "Get a Thinkpad" yet Lenovo doesn't seem to be a big Linux contributor or ally. There's also at least six Linux/FOSS-oriented computer manufacturers now:

• Starlabs
• System 76
• Framework
• Malibal
• Tuxedo
• Purism

So what gives? Why the love for a primarily Windows-oriented laptop when there are better alternatives?