Not anytime soon. They have a lot of work pending on the new app before it’s ready for prime time.
I believe the staff has mentioned that the Classic app is no longer being worked upon (except for critical security updates). This by no means says that it’s ready for sunset, if this were to happen anytime soon it would create total havoc as the new app (apart from not being completely stable and still slow) doesn’t support installing custom apps/devices as yet and is missing many critical features (such as routines, SHM control, lock/presence automations) which folks still use very happily on the Classic app.
So yeah, go ahead and use the Classic app and you won’t be missing out on much.