They already have four. What they need is one which supports 100% of the features, is easy to use and selected by default. They might keep other more advanced UIs but forcing new users to select UI as a first step, before they can do anything in the software is just plain stupid.
I understand that real men like you want their software to hit them in the face on start-up, and then refuse to do anything until you type SUDO, but LibreOffice UI isn’t even “good” kind of difficult. It’s not like Vim, where once you learn how to use it you become much more productive. LibreOffice is just a plain old mess. You start by selecting one of four UIs, where you need to guess which one actually works (I remember that a basic feature that I needed, after the extensive search, turned out to be unavailable in the UI that I selected at the start).
Ah, yes. My favourite programming language (checks notes) HTML…
If your favourite programming language is HTML, we do not grant you the title of Nerd.
Too soon, it might kill AI chatbots (fingers crossed)