I've been looking at using email aliases services, and right now I'm thinking of using Simplelogin for all my online accounts and accounts where I can change my email easily, and getting my own domain to share with people and where I can't easily update my email. It seems like I shouldn't use my own domain for online services because it would be unique and can be tracked.

I did lots of reading about this and am still wondering why someone would want to opt for catch-all domains over aliases. Catch-alls seem highly susceptible to spam and while I haven't actually done any email aliasing yet, it doesn't seem to take much effort to make a new alias if you have a plan with unlimited aliases.