Sorry to be a happy camper – I’ve had all released versions of Catalina on an 11" Mid '12 MacBook Air, & a 13" 2017 MacBook Air – and never a crash or issue I could report.
I’m running 7 external HD’s – WD’s & Toshibas – a Cannon scanner, and Brother WiFi laser printer – my display is an ancient Samsung 21" connected via Thunderbolt on to a DVI. I’m just not seeing problems, I’m glad to say.
Even with Mail, nothing’s gone astray… Don’t use Time Machine, can’t report on that, nor iCloud. Installs have gone better than with Mojave or High Sierra…
I will echo Brian’s post here: in Energy Saver I never permit display or HD sleep, and prevent the Mac sleeping when display is off – which it often is…
It’s nice to be an exception – and no, I’m not feeling smug about it!