I want viable alternatives too. But Microsoft's stuff accounts for a million+ edge cases that you don't really encounter until you're neck deep into whatever you're working on.
For the sake of conversation, though, there's SoftMaker Office:
But they're a subscription too. You save only $20 a year for less features than Office 365 as well (especially the lack of an email program). For most people, that savings and "no Microsoft" isn't enough.
Heads up that you can still buy perpetual licenses to Office either directly from Microsoft or through other sellers throughout the internet.
https://www.microsoft.com/en-us/microsoft-365/p/office-home-...
https://www.microsoft.com/en-us/microsoft-365/p/office-home-...