In line with remote-bricking discontinued hardware, these policies only serve to generate eWaste.
If you sell programmable hardware, or really anything with embedded software, you should be required to make all the tools and software available to end users (doesn’t have to be free, but shouldn’t require a subscription or support contract either) in perpetuity.
Licenses to enable additional hardware features are fine, but they must be granted for the life of the device (i.e. as long as it can be kept working), not an arbitrary “we think the life of this thing is 5 years”. You should never have to keep paying to use a device you already bought.
I'm not making a judgment on whether it's worth it or not, I think that depends on a lot of details, but when people throw out tariffs they are rarely honest about the fact that it's a tax that flows downstream to the end user. In some cases multiple ways, like farmers who pay higher cost for equipment due to tariffs, so production of their soybeans (or whatever) are higher, so then they needs USDA subsidies to make them price competitive for export, so there's multiple layers of taxation there to make it work.