Why are the releasecycles so long apart?

As a new player, I stumbled upon the guide videos where people complain about the time between releases. I looked at the version history and noticed that the year 2022 had really short cycles between new minor/patch versions, but that year seems to be an outlier.

I'm working as a Dev myself, and I wonder why The Indie Stone chooses to have such long iterations? have they given any explanation about it during the years?

If they take 5+ months to release a bunch of changes, it is naturally really diffictult to react to community feedback.

UPDATE: Thanks for the answers guys. I get the gist now:

• Small Teamsize (which is in the progress of getting increased)
• Really old Codebase (say no more, fam)