I don't see this trend with Linux. FUSE is very old and does not seem to get much traction. User space schedulers: where are they used? eBPF is like the other way around: people want to run more stuff inside kernel.

Honestly I feel that Linux server users are performance freaks and will kill for 0.1% performance. So it's very unlikely that they'll trade anything for it. They don't need stability, they'll just recreate server if necessary. They need absolute minimum of security (otherwise they would use VMs instead of containers).