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Microsoft Access included with Microsoft Office 365 (the annual subscription) is the latest version, which has new major tools and features like the new Linked Table Manager, which are unavailable even in Access 2019 (the version of Access included with Office 2019 one-time purchase perpetual licenses). 

Office 365 will continue to get new tools, features and updated released monthly with Office 365, whereas Office 2019 will not, and will therefore fall farther behind.  There are also some Office 365 features (especially with Excel, etc. and cloud features) which were specifically excluded from Office 2019, even though available at the time of its release.

You can check out the new https://www.youtube.com/watch?v=Zz-lxoHKfMg&feature=youtu.be – as just https://www.geekwire.com/2019/microsoft-clear-favorite-office-dispute-twins-battle-365-2019-versions-software/ (where you can find the other series of Office 365 twin challenge videos) – for an excellent (and pretty funny) example of the many new features, with AI and otherwise, which will only ever be made available in Office 365, indicating why it makes the most sense to go with that subscription model for MS Office.

If you have Office 365, I suggest https://insider.office.com/en-us/join under File > Account > Office Insider in Access (or any Office app) as described here for earlier beta (or actually more stable post-beta) access to the latest new Office 365 features, fixes and enhancements. You can select Level = "Insider" (for fastest access) or "Monthly (Targeted)" (for slower and potentially more stable access) when enabling / joining Office Insiders.

Lastest Edition is 2019