I mean, yes, it will be true for other R&D types. But that's also new and also broken for the same reason: it means new R&D companies are at a massive disadvantage in their first few years compared to the established players who have lots of expenses queued up to deduct. It's wealth redistribution from young startups to established players who have 5 years of past expenses to use in their favor, and that is going to be a very bad thing for the health and vibrancy of our economy.
And, as a sibling points out (and as I pointed out in a comment at the top level), software is in this regime singled out from all other possible R&D expenses, making it particularly vulnerable. A skilled accountant/lawyer can probably turn big chunks of other R&D expenses into something that doesn't fall under 174. No amount of skill can do that for software, because we're singled out.
And, as a sibling points out (and as I pointed out in a comment at the top level), software is in this regime singled out from all other possible R&D expenses, making it particularly vulnerable. A skilled accountant/lawyer can probably turn big chunks of other R&D expenses into something that doesn't fall under 174. No amount of skill can do that for software, because we're singled out.