They could even have it on by default, or rather, have “Excel NG/Matrix” be an optional no-quirk behaviour regimen.
They could have a scripting environment variable that is “quirkkMode=ON” by default and would maintain backwards compatibility at the small expense of needing to specify sane behaviour as an exceptional circumstance: just another line of boilerplate.
There’s a lot of things they could do. They’ve no doubt considered all of them and then some, and yet they‘c’è decided to do almost nothing. I suppose that says something about the disconnect between how we and they perceive their incentives, but I’m not sure what that assertion is.
They could easily make it an optional behaviour.