Based on their summary of the law I’d think that it doesn’t have too much impact on both Threema (E2E-encryption) and Proton Mail&VPN (probably more than 5k users):

If the law is passed in its current form,

Swiss email and VPN providers with only 5,000 users will be forced to log IP addresses and keep the data for six months - while data retention for email providers is illegal in Germany.

will require ID or a driving licence and possibly a phone number to register with various services - making anonymous use impossible.

Data must be transmitted in plain text on request, which means that providers must be able to decrypt user data (with the exception of end-to-end encrypted messages exchanged between users).

Nonetheless this is still extremely shitty and I hope that such surveillance doesn’t actually go through.