I've been maintaining this identity for a while now but I must admit it's hard for me, sometimes I wish people who know one of the identities knew what the other one is doing or has done, but self doxxing to one person could mean many others would learn the same.
Having this identity gives me freedom to say what I want to say living in countries I would otherwise not say, it allows me to do things without painting a target on my back, and it also allows me to go places I would not go fearing long-term consequences for my original identity.
I believe many here also enjoy the benefits of having another identity. But if you are serious about it you will need to create emails, various accounts, use VPN, use software that protects from fingerprint, so on and so forth. On a day to day basis this becomes a burden and I have accidentally doxxed myself a couple of times, so my recent thought is that this identity is probably compromised and I would need a new one, but this time I would create some physical boundary to isolate it, like having a dedicated computer to do all my online activity and not mix it with my other identities.
I think it's pretty awesome that the internet allows us to do that, and if you have a little bit of technical knowledge you can take the protections to a high standard. But often I find myself wishing I could just have my single and original identity, life was simpler back then.
I would like to heard from others their experience and advice on the topic as it's often lonely and hard to keep doing this.
These are some examples. I hope it is useful.