Personally, I didn't have any reason to look elsewhere because a couple of Pro accounts ensured I always had access without worrying about limits (the reason I never kept an Anthropic account active for more than a month).
I'm sure we'll quickly start seeing how the frontier models aren't all that necessary.
Combine this with the fact that you can't trust OpenAI with your data, I think they are blowing up the tiny moat they might have had.
It's also worth mentioning that their Dot product got nerfed in under two weeks. I went from rethinking my workflows to dropping the product completely overnight between the data loss and network firewall "issues".
It's too bad because I've been fine with using just ChatGPT since the beginning, simply because they were most generous with limits.
All good things come to an end I guess.