You really are talking nonsense. Office 2010 has nearly 3 YEARS of support left (including Office Starter), Office 2013 has 5 YEARS of support left (and is currently still in full mainstream support). If after that time, the user wants to get the latest Office or buy something else or go freeware, it’s their choice at the time. There is absolutely no reason for them to change if they don’t want to until that point.
What on earth are you talking about “whom are you to say they won’t stop the next day”? You do know Office doesn’t stop after support ends, right? Microsoft needs to give people attractive reasons to buy the latest Office, buying “just because it’s newer” is not a valid reason if your current version does everything you want and is still receiving security updates.