Comment by lmcnearney

I’ve inherited code bases that migrated from SVN to Git without converting and bringing over the old revisions. This has resulted in a number of times where I hit a cliff when trying to identify when a piece of code was changed as everything points back to the initial “SVN import” commit. Couple that with the original SVN repository being unavailable (either lost or just not worth the trouble of finding in 10 years worth of offline backups) and I would say yes, having your source control under one system with all of its history is ideal.