Due to where home is, this change wouldn't affect me.
As such, what I carry would depend upon season, clothing, activity/event.
Each season and type of clothing presents concerns about ease of concealment, and proper penetration through multiple layers of clothing.
As was said, those most affected would probably be those who carry OWB, or open carry.
For those who carry IWB and/or Concealed- many of the options already tend to be at or below 10 rounds.
I'd probably stick with .40, .45, 10mm or .357 for winter carry.
For summer, it might be as small as .380, or as large as .357/10mm/.45- depends on where, and doing what.