I use signal as my main chat app. I think it sucks. I often don’t get notifications in a timely manner (very widespread glitch on android) and because it stores images inside its own encrypted box, the app size balloons incredibly quickly. I cannot just empty out photos automatically, as with whatsapp, i have to export them and then delete them - manually.
I think it’s still worth it to not have facebook all up in my business, but the end user experience is shit.
Settings > data and storage > manage storage > review storage > select the media you want to keep > save
Your snark is misplaced. My complaint was never a complete lack of functionality, it was that it is not automatable, it has to be done manually, as the commenter above you so tersely but pointlessly, explained step by step.
Re: the notifications not coming, I’ve seen it similar from WhatsApp too. I reckon it depends much on which app you use more, so it gives enough battery time to keep aware of messages. Now I use Signal more, I think I’ve had more misses on WhatsApp.
That said, I’ve had a few weirder misses (for calls only, I think) that don’t seem to be from battery optimisation.