"regularly" is doing a lot of work here. When Linux drops hardware support, we are talking about ancient hardware. An example of a regular drop: Linux 6.15 just a month ago dropped support for 486 (from 1989)!

Open source software drops hardware support only when there are nobody left who volunteers to support that hardware. When does this happen? It happens when there are not enough users left of that hardware.

As long as there are enough users of some hardware, free software will support it, because the users of that hardware want it to.

Is "regularly" every 2-4 years, or longer? What are your options? With Apple you have none. It's really not a comparable situation.