Actually that's one of the main reasons Ive moved to DT, I want full control of my data, and the option to sync or not to other devices. I get a feeling that EN is going through major funding changes, which makes it feel a bit unreliable, tbh. As well as not having the option (on Mac) to have local notebooks, or to not sync existing notebooks, for me are big limitations. This is why I cant go forward with a premium acct even though Ive had one for almost a decade (and had EN for longer than that). But, I dont yet have longer experience with DT so that remains to be seen.
Worth saying that Ive opted to use Obsidian for my general note making. Very versatile, extremely good user experience and easy to sync locally with SyncThing, so I dont need to use their own cloud services. Im using across Mac, WIn10 and Android and it works beautifully.