This commitment by Lenovo must have been driven by customer demand -- in this case, the IT departments. I wonder how much of that demand may be attributed to questions about comparisons to Framework. Even if Framework is not mainstream, it has mindshare among the IT-crowd.
Framework is a great concept but they will die due to poor execution. If I hadn't already recently bought a Framework (and knew what I do now about them) I would've held out for one of these new Lenovos. I don't think Framework can compete if one of the established players joins the game.
Lenovo has long had a separate board for the power connector you could separately replace. This is likely a continuation of that idea. I had an X220 Tablet (Released in 2011) from eBay that was sparking when I plugged it in. IIRC I just unscrewed and rescrewed the charging board and then it worked again. I guess there was some short, maybe it was loose. It would've been easy to replace just that part if it had failed completely.
For me, Framework is super cool as a brand, both for the quality of their product and the ethos that backs it. When everyone else in the coffee shop has an apple or another brand so widespread that you don't even notice it, the gear is something different. I like that.
