That’s not true, although nothing can read it with the accuracy of Excel due to the complexity and lack of documentation on certain features.

That’s doesn’t seem unreasonable to me.
It’s a hugely important format used by countless archived documents.
We can’t just find out one day that nothing can read xlsx.

https://www.loc.gov/preservation/digital/formats/fdd/fdd000398.shtml

If it’s bevelled text you can swap filament during print to make it stand out / easy to read.
Only problem is that you have to baby sit the print, which could slow down production considerably