What is wrong with the old adage if it ain't broke don't fix it?
Yes Office can be frustrating at times but I much prefer the 'out of the box' versions such as 2019 (still happily using 2010 at home) rather than the constantly updated (read as 'oh FFS where have the developers moved (insert function of choice) to now?' version that is 365.
There is also the fact that some users (ie the Boss AKA Mrs Cynical Pie) struggle to use 365 due to the lack of block colours for the tool bars etc. Office 365 may look all clean and modern and shiny but sometimes old school works.