I'm definitely not a technical writer, so don't consider this an expert opinion, but would be be better to say "it it recommended to have an instance with at least..." rather than "you must have an instance..."?

To me, using "must have" means that we are following a specific requirement, when in actuality it is just the next highest, round, clean number for setting system resources for an instance.

In addition to what @sharder996 mentioned, it may also be worth reiterating that these requirements/recommendations only apply to ubuntu-desktop? (Other distros might have higher or lower requirements.) Maybe something like the following:

Installing a desktop environment requires more resources than the default Multipass instance settings. To successfully set up and run a graphical interface under ubuntu-desktop, you will need an instance with at least 10GB of disk space and 2GB of RAM.

Thank you for the suggestion, @sharder996 . I agree that 'recommended' is clearer and more appropriate than 'must' in this context (not using a hard technical requirement). I have updated the documentation with your phrasing and included @jimporter’s feedback. I appreciate the feedback!