About data availability:
DAS is typically used with erasure coding: data is encoded into a redundant version, and the full data can be recovered as long as a sufficient proportion of the pieces is available.
“Data availability” and “permanent data storage” are not the same thing: data availability only requires that anyone can download the data during the period when it needs to be verified.
$TIA 0.4782(+0.042%)

For reference only, not investment advice.