Here's how I think about it.

Don't think about the era, think about what it means for you.

Either we are entering the Arm era, or we aren't.

If we are, it won't matter. all the s/w in the world,languages, libraries,expertise, applications, etc aren't going to disappear, so it won't matter much. Programmers will switch compilers and learn new tricks, and consumers march on. I still buy games, play them, and code for a living.

If we are not, same story, just not as many new compilers.