It looks like you are referencing this thread:
It seems odd that that a power outage can kill both the wifi and cell connections. How can I tell if they are still working?
This isn’t normal, but the effect of a power outage can trigger an issue in older firmware versions of the IQ Panel 2. The fix for this is in firmware versions 2.7.1+ It is a rare but known issue that causes the radios to be unable to reconnect after a disconnect.
Updating firmware via SD card will resolve that particular issue.
If your panel was damaged by a power surge/lightning strike this would not help, but that’s unlikely.
are there any reliable alternatives to this Qolsys panel?
As the above post suggests, the IQ Panel 4 has been solid. We recommend Qolsys panels overall.
It looks like you were using a 345Mhz version of the panel is that right? If you have 345Mhz sensors you could reuse them with a 345Mhz version of the Qolsys IQ Panel 4 or a 2GIG Edge panel as well.