All DTHs, whether custom or stock, will stop working soon, so that’s not a long-term plan.
With the new architecture, your choices anre either to use the stock edge driver or a custom edge driver. The custom edge driver will take precedence over the stock edge driver. But you cannot go back to a DTH once the stock edge driver has been downloaded to your hub. It’s just the way the smartthings architecture works now. 
You can read more about this whole transition and the new architecture in the community FAQ, as well as how to find custom edge drivers.
FAQ: I have no idea what Edge is. Is that a new developer tool? (2022)