[noisem4ker]

To be fair, it doesn't really "lock you in": you're still able to restore your backups indefinitely even if you do not renew, just not take new ones.

[ziml77]

And even if you're scared of them removing the ability to restore for free, they released code to handle the new mrimgx format under the MIT license: https://github.com/macrium/mrimgx_file_layout