Yes you can buy 1-time payment licenses.
BUT, MS has increased the prices massively, to make 365 appear a better value
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Starting with Office 2010 Home and Student as a base, "best case" for users:
- cost approx $150 (or was it US$140? I'm pretty sure it was ... )
- allow install on up to 3 computers
- 5 years "normal" support, some limited new features, bug fixes, security patches
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- 5 years "extended" support, security patches only.
- $150 / (3comp X 10yr) = $5 per computer per year
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Since then, over the years MS has introduced various (dis)"improvements" to the one-time payment license terms. Including making it very difficult, to transfer one-time payment to a new computer. And effectively impossible to transfer, aka sell, a "used" one-time payment license to another person, even though if you read the license terms MS still grants us that "user right".
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Now Office 2021 Home and Student as comparison:
- US$150
- install on one computer
- 5 years normal support
- No extended support
- $150/5 = $30 per computer per year
Compare to current 365 Personal
- US$70 / year
- 5 computers
- 1 user
- $70/5 = $14 per computer per year
Best case for 365 is Family
- US$100 / year
- install on up to 5 computers per user "share"
- Owner can "share" with up to 5 people = 6 users total
- US$100 / (6 users * 5 computers) = US$3.33 per user per computer.
- 365 has extra "Features" that 2021 does not, making it a better value, if you use them.
Some context, evolution of 365 rental offers:
- Originally there was only 365 Personal
- Then came 365 "Home" owner + 4 shares.
- OneDrive had truly "unlimited" space. A few people
- Partner Benefits: Discounts / free trials of "partner" software
- OneDrive "improved" to 1TB per user
- Finally came 365 "Family", owner + 5 shares