It’s not an update but an upgrade, like 6.5 , 7.5 , 8.5 and now 9.5
Instead of waiting 2 years for a upgrade, we get a yearly upgrade the .5 upgrade is cheaper and includes some new features.
Version 10 that if all goes well arrives in a year’s time will have even more features and will be more expensive.
Of cause upgrading from 9.5 to 10 is cheaper than upgrading from 9 to 10.
You are not paying extra, you are just spreading the cost out on 2 upgrades, instead of one major.
I think it is a win win situation for both the users and the company, that gets a more steady cash flow .