I assume you are talking about this:
https://support.ledger.com/hc/en-us/articles/360014191540-Massive-transaction-fees-in-BTC-and-BTC-based-apps
I replied to your post because you said "Unless a vulnerability is found with 3.3.8 I am not really in a hurry.", and I pointed out that vulnerability has indeed been found month earlier in electrum 3.3.8 (And other software as you mentioned, Ledger etc), so it's not safe to use 3.3.8.
And latest Electrum 4.0.3 has been released on 11 September and it restores compatibility for PSBT after this vulnerability previously discussed, it has it's own CVE now: http://cve.circl.lu/cve/CVE-2020-14199
So definitely it's recommended to stay with latest Electrum and latest Bitcoin Core at the moment.