Also, striking an unconscionable term typically does not void the whole contract. Just the term in question.
Aside from that many of these contract have terms that might be considered substantive unconscionability - for example if terms state that what you post can be used by the company that owns the service for marketing of the company or the service I feel this would not make it through most legal systems that I feel before the attempt are not inherently corrupt.
As an example I have an email account with site A. I go to site A and log in, they suddenly spring a large new contract for me to read, I cannot get through to do what I came to do, it will take me 5 minutes to read so I click OK because I am on my way to check my email with site A. Procedurally this is not reasonable behavior.
What would be reasonable?
"Hi, we are changing our terms of service, you can see it at this link and agree. If you don't have the time right now you can do it later, but in three days you will lose access to the service unless you agree to terms."
There are however lots of other laws in the EU which may in fact make this behavior substantively unconscionable anyway. I certainly believe there would also be substantive arguments to be made in this case.
https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A...
https://www.nbcnews.com/news/us-news/disney-says-man-cant-su...
"Disney is trying to have a widower's wrongful death lawsuit dismissed and sent to arbitration because the man had signed up for a Disney+ account several years ago."
Now what happened was that Disney quit fighting over really bad PR. But the court challenge would have liteky succeeded.
Mozilla with their Thundermail just tried saying in their ToS that if you're mentioned at all in anything legal, you agree to pay their legal fees.