A follow-up
article has appeared on BBC News.
Those quotes are doing some heavy lifting.
Most of the "initial issues" have certainly not been resolved, as anyone following ScotRail's X account, or reading the ongoing extremely negative reviews on the Google and Apple stores can see for themselves.
Many people are buying tickets, no doubt. She didn't mention that lots of those people then couldn't activate those tickets, or they simply disappeared from their account.
The likes of myself and others "using the app to plan journeys" (i.e. to see how ludicrous some of the results are) must be accounting for a chunk of the "large number" of users.