downloaded an ODT documenting
Doesn't really matter what document format it is, I wouldn't dare using OO anymore. Maybe they still patch critical CVEs, and maybe no one even attempts exploits because it's basically just in maintenance mode, but you never know...
Change isn't fun, but I don't think that UI-wise Libreoffice is such a big leap?
And if it gets so bad that the bank starts losing money... no worries, the government will simply bail them out like usual!