All Witnesses Should Now All Upgrade to 20.2 (HF20)
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we can see already 17 out of top 20 witnesses are running on 0.20.2 - which is great and that urges the other witnesses to upgrade to 20.2 or otherwise they won't be able to produce blocks on/after 25/September.

I would say I do not agree on your call for witnesses to upgrade "because there are already 17 out of top 20 witnesses running on 0.20.2."

Not upgrading a node is also a way to say "I do not agree with the HF proposed" or "I do not agree with the current schedule after a major crash".
Following top 20 witnesses like a sheep, that would not be worthy of a responsible witness.

Your exhortation should rather be based on the benefits of the HF 20 as the main reason to do so, not on the fear of missing blocks.

And remember, everything can happens until the fork date/time. We experienced it not too long ago! ;)