Personally I live in a very rural location and I farm, so I can spend a lot of time on the road or in my tractor. 1gb wouldn’t get me through a day in the field, so I have a pretty big collection with a lot of variety. We don’t even have reliable FM radio here, so it’s bring your own music or listen to the diesel roar.
We’re talking about replacing lost content here though. And as such you can use the streaming services as a “backup” by re-ripping your whole collection if you lose it.
I’m actually doing this now as part of a library cleanup. Zotify + beets are a great combo to pull down vast quantities of music and properly sort and tag it.
Then I stream it to my phone in my truck using ampache and ultrasonic, which does have a local buffering option.
However if you have some exotics that you ripped from rare discs, demos or prerelease, live recordings with sentimental value etc. I would suggest keeping those properly backed up. I don’t have many of these, but the ones I do have are backed up both cloud and offsite.
As the other commenter said, it’s all about depth of discharge. A 10kWh Lifepo4 bank gets you almost 10kWh every time while you should treat a 10kWh lead-acid bank as if it was a 2kWh bank for any sort of decent life, with deep discharges being limited to emergency situations.
All lithium chemistries are practically maintenance free while you are probably familiar with water level monitoring and equalization of lead acid.
Note that all site built lithium banks MUST have a balance mechanism as this is their “automated maintenance”. Without balancing on every charge, lithium cells will be rapidly destroyed.
“Deep cycle” batteries are the best of the lead-acids for the task. But they are still obsolete and you should source lithium if at all practical.
However if power interruptions are short, loads are low or you have an external power source like solar or wind, inferior batteries can do the job.
I use a bunch of old car batteries at my house for my battery bank. It’s more of a big capacitor, but it’s almost always sunny here and kW of solar are pouring in.
My critical equipment i.e. starlink, home and farm automation and monitoring, cell booster and HMI/SCADA only take a couple hundred watts, so no big deal. Most of the solar power goes to keeping the freezers cold.
Even with external volumes, I don’t think there should be any mechanism where a container can escape a bind mount to affect the rest of the host fs? I use bind mounts all the time, far more than docker volumes.