That is my plan, I have (had, you have to let it go) an old account from when it was a just username, never bothered "updating" it to the email account, I tried to convert when Microsoft said they were dumping all the old accounts, but the process was not working and I quickly decided I don't actually want a Microsoft account. At which point I decided that if I ever wanted to play again I would just do so sans account.
Which raises an interesting question, If I legally have a license for the game but they shut off the license servers, is it actually copyright infringement? (or piracy as people like to call it because copyright infringement sounds lame)