I've added the only clearnet node from @Pmalek post (I'd feel better if the list would be bigger).
I didn't add this, and it still worked 
It's not unexpected, especially given to the fact that it literally took one second from my (second) low-fee tx being broadcasted from Electrum to be visible on mempool.space
But a few more hardcoded relay nodes... give a nice peace of mind this early in the low-fee "era".
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all[/i] suggestion would be to maybe centralize all this into the first post so the ones even lazier than me (who also have local ElectrumX) can use it.
It was more meant to be my own personal log, it's too experimental to be a complete guide.LOL, no! My confirmation was supposed to tell it already works pretty much out-of-the box (of course, if you already have bitcoind and fulcrum already in place and a new enough Electrum).
Of course, it's your topic. I am already happy with what I've got.