Both JSON5 and JSONC have those features. There is a discussion[0] on the VS Code repo to use JSON5 format instead of JSONC for the settings file.

[0]: https://github.com/microsoft/vscode/issues/100688

Use jq then. It has comments, though no trailing commas (we could fix that).

As a bonus using jq code as configuration gets you templating for free.

Nah, I'd still pick YAML any day.