1. You can export your entire database (it's a stanrad Mongo database).
2. You could use the library and write your own backend API using the same routes and your application would not need any changes if you decide to stop using StaticBackend.
3. You have the option of purchasing the source code. From there you may do whatever you want and change direction and what not.
I admit that the 2. needs efforts on your part to switch. But it's possible to stop using the tool and still have no rewrite on your frontend code at all.
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How is there no lock-in?
1. You can export your entire database (it's a stanrad Mongo database). 2. You could use the library and write your own backend API using the same routes and your application would not need any changes if you decide to stop using StaticBackend. 3. You have the option of purchasing the source code. From there you may do whatever you want and change direction and what not.
I admit that the 2. needs efforts on your part to switch. But it's possible to stop using the tool and still have no rewrite on your frontend code at all.