Some sections aren't sending teams to Nationals at some levels

The USTA has been publishing schedules for 2021 USTA League Nationals and they've gone through a few iterations, seemingly as teams from some sections have elected not to go.

I wrote a few days ago how Nationals work, and as I write this, it appears:

• 18 & Over 2.5W - 15 teams, Hawaii and Northern not sending teams
• 18 & Over 3.0W - 17 teams
• 18 & Over 3.0M - 15 teams, Hawaii and SoCal not sending teams
• 18 & Over 3.5W - 17 teams
• 18 & Over 3.5M - 16 teams, Hawaii not sending a team
• 18 & Over 4.0W - 16 teams, Caribbean not sending a team
• 18 & Over 4.0M - 17 teams
• 18 & Over 4.5W - 15 teams, Caribbean and Hawaii are not sending teams, Hawaii was originally listed as sending a team
• 18 & Over 4.5M - 16 teams, Caribbean is not sending a team
• 18 & Over 5.0W - 11 teams, Caribbean, Hawaii, Florida, New England, Northern, and Southwest not sending teams
• 18 & Over 5.0M - 12 teams, Caribbean, Hawaii, Middle States, Northern, and SoCal not sending teams
• 40 & Over 3.0W - 16 teams, Hawaii not sending a team
• 40 & Over 3.0M - 15 teams, Hawaii and Northern not sending teams
• 40 & Over 3.5W - 17 teams
• 40 & Over 3.5M - 16 teams, Hawaii not sending a team
• 40 & Over 4.0W - 17 teams
• 40 & Over 4.0M - 16 teams, Hawaii is not sending a team but originally was
• 40 & Over 4.5W - 16 teams, Caribbean not sending a team
• 40 & Over 4.5M - 17 teams

Hawaii is not sending 10 teams, no big surprise given the travel required, Caribbean similarly is not sending six teams, and Northern isn't sending four teams.  In some cases the teams not being sent are at the top and bottom of the levels where the smaller section may not have critical mass for leagues and simply doesn't have teams as well.

Such are the challenges of having championships for a country with locations so far apart and population differences.  Still, it looks like a good turnout all things considered and a great comeback after no Nationals last year.