He would have revised his economic modeling I mean, not his historical argument which is still sensible to me, albeit potentially irrelevant.

I dont think the reserve army makes any sense in todays world. But it did in his were labor was so interchangeable that people migrated for labor in masse all the time. I dont think out of work janitors put a lot of pressure on software engineer jobs. That unemployment in general drops wages, or that full employment increases wages, is a much older concept than Marx's.