Uh using an out of date and unsupported Excel version is a really bad idea. Lots of security vulnerabilities around VB scripting/macros which gives you the very real risk of being compromised by a malicious spreadsheet.

Better to just switch where you can and invest resources into improving FOSS offerings to handle the use cases it currently can’t.

Executing malicious code on your computer is a problem, ye.

If you want to give the users a nice programming environment you can't also prevent them from doing arbitrary computations.

You can run Excel in a VM if you want.

Medical researchers in many places leak non-anonymized sensitive patient data to MS, even when they know better and that's one of the reasons Office LTSC exists

> Vendor lockin

That, but also lack of feature parity. Unfortunately Libre Office is just not very good