On the scale of years, products fail, get bought, are unmaintained, become too expensive, etc... An export of your database is always a hassle to manage, and you must hope there will be an importer for the next product that will also fail a few years down the road.
On the other hand, files have always been there and will always be there. Epub is a standard-enough format that will live. The highest piece of complexity is syncthing, which can be easily replaced the day it doesn't work anymore. Bonus: I have all my data offline so I don't need connectivity, and I lower my environmental impact.
Too often products feel like a reinvention of the whole stack because it's easier to sell, rather than reusing proven tools and using them the way they were supposed to be used.
On the scale of years, products fail, get bought, are unmaintained, become too expensive, etc... An export of your database is always a hassle to manage, and you must hope there will be an importer for the next product that will also fail a few years down the road.
On the other hand, files have always been there and will always be there. Epub is a standard-enough format that will live. The highest piece of complexity is syncthing, which can be easily replaced the day it doesn't work anymore. Bonus: I have all my data offline so I don't need connectivity, and I lower my environmental impact.
Too often products feel like a reinvention of the whole stack because it's easier to sell, rather than reusing proven tools and using them the way they were supposed to be used.