NTP, DHCP, SNMP, FTP, SSH

• NTP just tells you time. No confidential data here.
• DHCP and SNMP dont go over the internet. A VPN won't save you from this.
• FTP is dead. Not even web browsers support it anymore.
• SSH is already encrypted. In some cases, it can literally be used as a VPN.

Wireshark is useless on WPA3. Although hotel wifi typically doesn't use it.

SNI is encrypted with ECH.

I disabled plaintext SMTP on my mail server years ago. Requiring TLS actually reduced spam by 99%. No reputable mail server will use plaintext.

Almost nothing uses plain HTTP. The only thing I typically see is my phone's internet connectivity check, which simply returns an HTTP 204 (No content). It's practically a ping.

HTTPS + DoH is enough because all of these problems are solved.