Thanks @sparkktv for the opinion.
If you're using iOS 13 beta and Catarina, it would be fine to use Reminders or GoodTask with or without the updating the database. Most of the bugs are gone now and current existing ones are that URL field is not showing and some unknown crashes (many of them are resolved in v4.7.3).
If you'd like to try and use new features on the Reminders app, you can use it.
If you want to use existing features of GoodTask, it'll be fine too.
I'm not confident of Apple opening new APIs but seeing changes of URL field (even if it's a bad bug) might be a sign of some changes that will come to current APIs.
If they're going to open some new APIs, they'll probably open it way before GM since it could have bugs and they'll need to fix them too.
Anyway when new API gets opened, I'll post how GoodTask will adapt them. Even if it doesn't get opened, there are plans for improvements in current status and related updates will come one by one.
Don't forget that the most important thing is to get things done!
Thanks!