Using the camera without an SD card and relying only on the cloud events with 5 minute timeout does have limitations. You may want to vote for this topic:
Wyze is also developing an NAS solution called MaxDrive. When it initially ships it may require an SD card in the camera, but eventually it will not. Sorry, I don’t know the planned timing of the release. You can follow it here:
Those are, of course, in the future and don’t really help you now.
I think it’s important to keep perspective that there are well over a million units out there and very few SD card/slot issues reported. It’s been stated by Wyze that there is very little risk of actual fire since the cameras are made with flame retardant materials. Wyze will get this investigated very quickly so we can know if it’s a problem with a specific batch of card slots or the the cards themselves. In the mean time, personally, I’m continuing to use my cameras with SD cards installed.