Why are paper LOAs still used?

[Seth Mattinen via NANOG <nanog () nanog org>]

Why do companies still insist on, or deploy new systems that rely on 
paper LOA for IP and ASN resources? How can this be considered more 
trustworthy than RIR based IRR records?

And I'm not even talking about old companies, I have a situation right 
now where a VPS provider I'm using will no longer use IRR and only 
accepts new paper LOAs. In the year 2024. I don't understand how anyone 
can go backwards like that.

~Seth