What's the current preferred SSP export automation tool I should be targeting?

OpenControl looks really promising, but it also looks like a dead project (no activity for years, and evidence that industry (e.g. RedHat) is moving away from it).

It seems like OSCAL is the currently preferred SSP format, but the tooling around it doesn't seem quite as mature as OpenControl (e.g. the only "convert to .docx" tool I found warns of missing fields).

Thanks!