[jddj]

Thanks a lot. I developed and support a standalone desktop application which contains customer-specific tiled maps, and it can get unwieldy.

A pivot at some point to these types of archives is an option, but I'd like to roll forward existing customers as well.

[bdon]

If you have access to SQLite in your desktop application then there isn't any big wins from using PMTiles over MBTiles; PMTiles does have some special design around tile-deduplication but this is possible in MBTiles too by using table views.