For me as someone with a above average memory for these sorts of details and someone who types URIs into browsers and shells, -team is fie extra characters to type. It's also a naming restriction in a place where I'm not used to seeing naming restrictions onother gitlab sites.
However, I too am in favor of keeping it, and that's because I'd like to keep the set of potential account names distinct from the set of potential groups. I understand we do not have a guarantee of that distinction today. When registering an account, if we do not already have the salsa account name reserved, we do already need to check if there is a salsa namespace. If there is we may run into trouble if we ever want that salsa account name. It's not a guarantee I'm looking for. It's more a matter of convention and average case where I care about the separation. Which is to say it's something I care about for human factors rather than for exact guarantees. So, even though I wish I wasn't saying this, please keep -team. --Sam