I cannot really tell which one "looks really old":
OBS Studio in .deb for Zorin OS 16:
OBS Studio in Flatpak for Zorin OS 16:
Your original statement:
It is not really old.
Such comments can confuse or mislead users that are led to believe that somehow... the Supported Current .deb package is... "really old."
You have every right to enjoy your preferences, but sometimes, choosing wording carefully can save someone else from a major headache.
And it gives the impression that Zorin OS is supplying "really old" or outdated packages. This is not the case. The packages are supported, receive updates and are maintained.
Flatpak does often offer the very latest package. However, the very latest packages can often have instabilities, bugs and regressions which is why many distros stick with the Current Stable packaging as default.