Yes. I just replaced the ones in my wife's Sony earphones by following a step by step guide on ifixit. Cost me $15 for the batteries including shipping, and they're not even any sort of exotic type or size.
Edit: okay just read the article. Guess these are a lot more convenient to replace than the Sony ones.
While I've no idea of your exact needs, I've been a happy Affinity customer for almost 3 years now (freelance web dev/designer).
It has everything I need (vector work, photo editing), and no subscription.