A combination of XFS and ZFS. I work in high performance computing (academic). While I love the reliability of ZFS for data archival and peace of mind that results provably haven’t suffered bitrot, sometimes I just need a 10 TB temp file(s) with fast mostly-sequential R/W. Appropriate selection of file systems lets me have both.
Even Palo Alto notes that they can only effectively block DoH if you're MITMing all https traffic already (e.g. using a root certificate on corporate-managed devices). If not able to MITM the connection, it will still try to block popular DoH providers, though.
https://live.paloaltonetworks.com/t5/blogs/protecting-organizations-in-a-world-of-doh-and-dot/ba-p/313171