[tracker1]

Why do I need to manually convert anything? Even then...

    var results = (await sql.query`
      ...
    `).recordsets[0].map(rowToObject);

It's really easy... no need for complicated ORM/ODM tooling at all.

As far as the size... create a docker container from node:10-alpine to run a given node application, and create a similar container with any application running full Java. And compare the final size.

[stickfigure]

Did a date column get mapped to Date, moment, date-fns, luxon, or any of the dozen other choices that your shop might standardize on?

I've never heard anyone server-side care about the size of a deployable. It's the size of the codebase that's an issue. Tedious conversion code does not work in javascript's favor.