I've been using ProgeCAD since 2020, coming from multi decades of being an AutoCAD user, lisp writer and although ProgeCAD does have some limitations on zoomed in line details ie lines may appear unstacked or unsnapped when they are actually stacked/snapped, on the whole its running at 99% of AutoCAD capabilities but at a tenth of the price, hence I won't be going back to AutoCAD! There is not enough profit margin in my line of work anymore to warrant the silly expense of AutoCAD. With ProgeCAD I can do a lot more than I could with Standard AutoCAD, such as 3D buildings modelling & rendering, without having to buy extra software modules. I'm Old-School for screen layout, so my ProgeCAD layout is tailored to look exactly like my old AutoCAD layout, so learning the ProgeCAD icon commands was "as I was drawing" so I didn't drop my drawing production speed to any extent. It still feels like I'm sat infront of AutoCAD, with a bundle of extra software tools built in, like the "pdf to vector" command, which other architects now send me pdf's and ask if I can make a vector dwg for them! In summary, one of the better moves I made to shift away from AutoCAD and ProgeCAD has been rock solid stable, no crashes, regular updates every year.