Hard to tell, indeed, what's gonna happen, so certainly a bit too early to invest. Also assuming you like the direction they take.
They do "deserve" it for sure, but it's a double-edged sword. I'm afraid prices will inevitably tend to go up, and they are likely to focus on hype stuff such as AI everything.
Yes the RP2040 was pretty innovative, and rather unique. You probably know that it was actually designed *after* the RP1 (sure, it's the RP2), the IO chip in the RPi5, which contains a similar PIO - it was initially designed for the RP1. I think the RP2 project came later as some kind of "why not" thing, reusing a number of blocks in the RP1, and it worked.
But precisely, I'm absolutely not sure they'll have the opportunity to lead a similar project under the pressure of shareholders.