https://www.arm.com/glossary/isa
https://www.theregister.com/2023/08/31/a_star_star_domains/
https://www.theregister.com/2023/09/12/arm_markstedter_domai...
You can't call a company that literally developed the IP they patented "trolls."
"Patent troll" has the connotation of an organization or individual who buys cheap patents and sue other organizations on mostly bogus claims related to these patents, hoping that the other side won't want to bother and just settle the matter. That's not Arm's business model.
ARM doesn't have a big enough moat to stay static and just troll. There are competing ISAs, some free, and there isn't as big of an lock-in as for e.g. x86.
The linked articles are about the brand name, Arm, used in a domain. You wouldn’t put “intel” or “nvidia” in your domain name without drawing attention. Maybe we need a moniker similar to x86 to define the arm architecture more generally.
Computing is a complex business and few companies do everything in house. ARM's business model of focusing solely on the IP seems to have worked well for them. From the engineering side, it's certainly nice to have the ability to pick and choose which IP blocks we'd like to use and then shop around the design ourselves versus having to battle with Intel to get what we need while trying to poke through the various layers of obfuscation they tend to put in place.