I personally found the Pros to be very uncomfortable and replaced them with the regular non-Pro AirPods - which are great from a convenience and comfort point of view.
I'm used to noise cancelling earbuds from Bose (QC20) and hated the IEM design of the AirPods Pro.
With Active Noise Cancelling (ANC) enabled on the AirPods Pro, there was an uncomfortable pressure in my ears, which resulted in migraines in less than an hour - several times.
Meanwhile I can use the Bose QC20, Sony/Bose over-ear ANC headphones, or regular AirPods all day with no issue.
You can enable spatial audio with any headphones.
Head tracking is limited to the Pros due to additional hardware requirements.
That's surprising. I often have trouble switching my AirPods between iPad/iPhone and Apple TV devices.
They always seem to auto-connect to the wrong one, and are a pain to switch.
I need to check on my ipad because there are no settings in apple music for spatial audio on my s21.