i strongly advise against it. blockstream is a company and centralized companies should never be trusted in bitcoin world. they WILL definitely track and store all your addresses and IP addresses and link them together. and while using an Electrum node you are sending all your addresses to that node so it is an easy task to achieve. if anything i would suggest banning that node or disconnecting from it anyway you can.
random nodes run by individuals has a much lower chance of recording your information.
Allow me to chime in again. Exactly for those reasons I would have discarded it and not even have bothered, but the reason I came here and asked the question was that Thomas Vögtlin himself, the creator of Electrum, is endorsing it. Or so it seems to someone who is not a user of Twitter. I mean, he should know, shouldn't he?