It is an interesting finding that "high end" second home sales are considered to be on the rise. Instead of incorporating this into a market trend, it would be better to consider the impact on the future.
My take is that people are not doing this as a real estate investment or to have a "second home" for the long term. The longer these 'buyers' can work from home (or without having to constantly commute to an office location), the lower the chances of returning to that status.
As soon as they learn they don't have to "return" to their current city home (the 'first' home in this scenario), the next step will be to place the 'first' home on the market. The "second home" will become the primary residence.
If, for some reason, they need to return to commuting, the "second home" goes back on the market or becomes a rental property.
You heard it here first.