Answered
Illustrator 2021 can only "save as" 2020 (?)
When I choose "Save as…" from 2021 (25.3.1) it appears that I can only save is as a 2020 file, not 2021. Why? I am wondering

When I choose "Save as…" from 2021 (25.3.1) it appears that I can only save is as a 2020 file, not 2021. Why? I am wondering

Not an oversight I think. You'll see that although Illustrator has over 20 versions, there are only 12 formats. It's a good thing when it doesn't change on a new version, because sharing files is simpler.
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