I can understand the importance of use cases and proof of concepts. Looking at number of transactions and adoption of prototypes on signet for a soft fork is beyond me.
Especially when I see such things on signet:
It was tested on CTV signet and transaction is shared in the repository. I am sure some developers prefer to use regtest as well.
I have seen zero interest in average bitcoin users to try anything built using OP_CAT. Although some of them have tried using CTV playground.
These 2 transactions are mine and were used to demo joinpool.