So when I see critiques of GIMP versus Photoshop, or Linux versus Windows, or LibreOffice versus Microsoft Office, saying "oh, it has fewer features and therefore nobody can take it seriously" it's just reductive, and provides zero useful insight. It's all about the particular needs of the person or organization and how those intersect with the features of the product they're thinking of adopting.
I'm convinced the people who insist on "features" in these products don't actually use them, because if they did they would realize they suck and are a distraction from a poor core product. It's like people in the US who live in downtown apartments and insist on driving massive overpriced pickup trucks to commute to work and get groceries, never hauling or towing or leaving the pavement. They would be better served by commuter vehicles, but all they've ever driven is show trucks and learning new things is scary. If they did attempt to do real work, they would quickly realize the bed can't hold a standard sheet of plywood.
The important thing is that they FEEL like they have capability at their fingertips, even if this is obviously an illusion to people who actually use those capabilities.
I have a direct comparison because the exact same computations were previously implemented in excel and libre office. Both dropped plots from files, had straight-up reference bugs once things got large, and would regularly crash attempting to render dozens of tiled plots in 4k. The idea of using Google sheets for this is laughable.
But too often I think people just think of Word vs Writer but we're talking the Office experience here. Calc is a poor man's version of Excel: I've found it slow with many rows of data and crash-prone (Office is surprisingly solid). Then there is Visio vs Draw. Use Draw for anything complex and you're going to have a really bad time. Us Engineering folk would put together Visio documents all the time and embed them in lengthy technical documents and proposals. Trying to do this in LO is a road to ruin. The Linux folks would either draw diagrams with sticks and boxes or get somebody in Windows to make something decent in Visio.
What we ended up doing was giving a Windows VM with Office on it for those Linux users that needed to produce documents and the like.
and at that point, you might as well just use windows, you aren't getting any advantage out of linux and are spending a bunch of overhead managing it.
For LibreOffice there is still a huge functionality gap in VBA support. This is mission critical in a lot of places.
I'm not to worried about the LibreOffice part.
Anyway, if the government is generating files that require MS office to open, they are essentially creating an undocumented tax, to be paid to a foreign company. This seems… legally questionable (depending on your local laws of course), and wildly stupid.