How to follow tags & Labels across communities and blogs? Idea: RSS

Do you agree it would be a great idea to have RSS feeds enabled for topic tags? Take this tag page as an example:

https://techcommunity.microsoft.com/t5/tag/OneNote/tg-p

It has posts from multiple blogs and communities.

I know MTC supports RSS feeds by space, but I'm looking for feeds across spaces.

On that note (!), it could be useful to allow notifications for multiple tags in one custom feed, e.g. 'OneNote', 'One Note', 'notes'. I hope this is feasible.

Thoughts?