I bought RegexBuddy years ago and have loved it for debugging. However it only runs on Windows. Found regex101 recently and I think it's a great alternative (though I almost didn't check it out because the domain has SEO abuse site vibes).
Have you seen https://regexr.com? I've only come across it recently but I really appreciated the visual description of complicated regex, especially for interpreting someone else's work.
I think that's actually the problem. I'm used to domains that are very precise being used to host junk content. Most popular sites aren't so narrowly focused and/or have some brand-name-like domain.
