With a quick mainboard model lookup, I was able to purchase a compatible TPM 2.0 module for about $30 CAD. Plugged it into applicable headers and flipped a BIOS setting.
I don't entirely understand the issue. Companies take stances on things all the time. I remember when hardware companies started to shed parallel ports, and I was kind of upset. Cell phones shed headphone jacks, which I still don't entirely understand. And when Microsoft pushed the Ribbon UI on us (and I'm still upset about it)
I don't know if it warrants trying to urge other people to cancel a service or anything, I think we're all well within our rights to change what we personally use. If it's a bad decision the market will speak for itself. Though I suspect it will be just every other thing, and aside from obsolescence that most people cannot relate to (the machine is still fast enough by my standards), this too will pass.
I think this brings an interesting point though. I think most of us consider a machine obsolete on things more superficial than it's technical capabilities. If I were to define capabilities as things its capable of doing, rather than how quickly it can do them.
I also suspect people will come up with better hardware workarounds as well, such as modules that can be plugged in on interfaces that pretty much every computer has, like USB.