Raspberry probably isn't profiting from it though, they're legally obliged to do it, and they are also trying to make their hardware cheap as possible, so making it optional in a device like RPi makes sense.

I don't think the big players have the same intentions though.

Yes and even with MPEG-2 patent expired, they are still offering that https://codecs.raspberrypi.com/mpeg-2-license-key/ so not sure how that cost breaks down today.

In the field of physically-large CPUs I don't find this surprising. DEC 10's came in a wide range of models, and a KA10 variant for example could be field upgraded to a better variant, e.g. certain byte-access instructions added to extract bytes from 36-bit words, hardware floating point, and so on could be added. A technician would come and stick in some boards and wire-wrap them to the rest of the machine, and the machine's owner would pay for that. I only know of this with IBM and DEC but I would not be surprised if all the expensive machines were field-upgrade-able.