Actually, considering the long-term average growth of “developer market-rate salaries” it makes sense to transition as early as possible (as soon as the new alternative is announced/becomes available) to minimise overall cost and capture the market share of those who shan’t transition when deprecation is announced and cost of developers is too high to make it worthwhile.
Except if the new thing flops and the old thing doesn’t die - which is much more common in the Windows world. MFC is mostly dead. So are ATL and WPF. Win32 is still going strong though.
