Storing big list in single record

Whats alternative to store >10MB list in single record if following feature is deprecated ?

You can use storage-engine memory which doesn’t limit the size of a record.

You should be able to use list and maps and break them up as they grow over the write-block-size limit. There are multiple ways of doing this but it does require just a bit of work on the application side to keep track of the different records that compose such larger record.