There are some shortcomings, but overall it's a useful tool. Due to recent server stability issues of some of my 'home' instances, I've been creating accounts on smaller instances and using this tool to quickly migrate my subscriptions.
Ideally, I'd like a tool than can just keep a specific list of accounts in sync as much as possible in realtime.
Even if you don't plan on migrating your user config to another account, this tool is very useful as a backup tool. Imagine if your only server suddenly became unavailable or went totally dark - you'd have to create a new account and recreate all those subscriptions and settings by hand and by memory. With this tool, you can make a periodic snapshot of your account to be used later if needed.
What's weird is how I missed that announcement. I used to be sub'd to !android@lemmy.world but they announced they were packing up and merging with another android community on another instance (that I started subscribing to). I thought the community on lemmy.world was dead, so I blocked it because I kept accidentally subscribing to the dead community. I'm shocked to see it thriving again.
I'm not sure if it was as much of that and more so people who didn't wanna go to another instance were complaining about how they essentially locked that name just because they throught the reddit android mods should be the true successors and some were very against the idea of just giving control to ex reddit mods. I didn't notice it took off again either but people were really calling on the admins to replace them