I don't want to steal this thread, but please allow me to step in here.
An old thread exists, titled
"standard-rename-how-to-get-the-filename-without-extension"
The {name|noext} was suggested there, but didn't work back then and so far has not been introduced.
Please correct me if I am wrong.
'Solutions' were always related to scripting and/or regex.
I had a number of occasions where I needed the filename without extension, checked the old site above.
Coincidentally I needed it again just now and stumbled over this recent thread.
Q: Could this {name|noext} not be reconsidered?
Thanks.
(I now made a preset)