Pp until 2018 fixed asset apps created much better reports and had useful features not in the built in deprec modules of Profx, Ultratax, and Go System.
for clients with a lot of assets that need book deprec, i can see still using standalone fixed asset apps.
And Ultratax stand alone fa app does integrate tightly with Ultax so that might be an outlier. Only sends total to Go System, which is kinda useless say when you have Sect 179 dispositions for S corp.
With all the aggregations, elections, Fed to State differences, State to State differences, seems like a standalone fixed asset app creates more work and errors than it helps because most fixed asset don't fully synchonize with tax prep apps.