There was a similar discussion started in September 2021 >
https://bitcointalk.org/index.php?topic=5361261.0.
The OP of that thread was arguing that Bitcoin shouldn't be called an "
an experimental digital currency".
achow101, a Bitcoin Core Developer and Contributor said the following:
Bitcoin Core still (intentionally) contains a line that says "this software is experimental". The line saying that Bitcoin Core is beta software was removed in 2014.
Also, regarding the version number change from 0.21.0 to 22.0, achow101 said:
The version number is not an indicator of experimental or beta status.
...
It is a cosmetic change and does not indicate anything of significance, so there was no announcement or celebration because there is nothing to announce or celebrate.