> This will run on a dedicated core, or in kernel space, or with Xenomai.

Most the USP of these is that they have an M-core which is usually where such tasks would live.

In automation it's not unusual to find controllers where the entire system lives on an MCU, and you quickly find that it's difficult to keep up with network requirements. I have devices where the MCU is 20+ years old, and the embedded TLS implementation hit a constraint 10-15 years ago.

This looks like the ideal use-case for these; your actual application lives in the M-core as it always did, but your network, TLS etc into an A-core that's much more suited to them, and where "fullsized" implementations are much more readily available.