Re: "and switching to plain text"
"If specialist had to re-create documents from plain text data only, they would spend a lot of time to understand which formatting they should apply."
tab-delimited works best. CSV is cumbersome and doesn't handle use of the double-quote for inches very well, nor the use of commas to separate the decimal on a number.
Tab delim works with 'awk' and pastes directly into a spreadsheet with columns properly set up afterwards.
What's not to love?
and in case they refer to 'plain text' with respect to inter-office communications, I'm totally on board with THAT. HTML mail is an *EVIL* *CANCER* that should've been nuked out of existence early on.
post-edit - UTF-8, same as 'plain text' from my perspective.