Re: It may take a while, but... (@ iDavid)
"Cost is far less important here than peace of mind."
Agreed. Now we should discuss how having your documents in Office 365 could possibly improve your peace of mind, given that:
1- The formats used to store your data can be changed by MS on a whim - even while still paying lip service to some standard format or another- in such a way that any document you export to a new app will be ridden with subtle formatting errors. Thus, if you try to shift to a different office suite you'll find yourself with several thousand documents that need to be re-formatted by hand.
2- The price you pay for your yearly subscription could change next year or the year after that, again at MS whim, so MS may wait until you have some critical mass of documents in their format and then raise the subscription price in such a way that changing to another suite and retrieving/exporting/fixing your documents is more costly than paying the ransom new subscription price.
3- Your use of Office 365 may force you into using other MS apps, for which MS could, at least in theory, charge you whatever they please, as these other MS apps won't be subject to market pressures. In fact you'll become another hostage in another walled garden.
4- A boxed/eternal licence app will still work 10 years in the future, so MS can't use it to extort you.
IMHO, putting all your eggs in this particular MS basket will put you under the worst kind of consumer lock-in scheme that anyone could devise.
Now, please tell us again how being turned into the proverbial boiling frog helps your peace of mind. TY