Ok but one more on that meme:
Boston is one of 7 metropolitan areas with champions in all 4 NA sports (the others are Chicago, LA/Anaheim, Baltimore/DC, Philly, NY/NJ and Detroit - argue with me on Bal/DC if you like but that's how I'm drawing it up). There are 7 more with 3 of 4 (Dallas, Bay Area, Pitt, Miami, St Louis, Milw/GB and Cleveland) and 7 more with 2 (Houston/San Antonio, Tampa/Orlando, Denver, Seattle/Portland/Vancouver, KC, Toronto and Minneapolis/St Paul).
As far as a city/region's last championship the top 5 standings are:
1. Boston (NFL - 2019)
2. Bay Area (NBA - 2018)
3. Bal/DC (NHL - 2018)
4. Philly (NFL - 2018)
5. Houston (MLB - 2017)
just missed top 5: Pitt (NHL - 2017)
For the time of the last time since a city/region won in 2 sports it's:
1. Boston (NFL - 2019, MLB - 2018)
2. Chicago (MLB - 2016, NHL 2015)
3. Bay Area (NBA - 2018, MLB - 2014)
4. Bal/DC (NHL - 2018, NFL - 2013)
5. NY/NJ (NFL - 2012, MLB - 2009)
just missed top 5: Pittsburgh (NHL - 2017, NFL - 2009)
just missed top 5: Philly (NFL - 2018, MLB - 2008)
For the time of the last time since a city/region won in 3 different sports it's:
1. Boston (NFL - 2019, MLB - 2018, NHL - 2011)
2. NY/NJ (NFL - 2012, MLB - 2009, NHL - 2003)
3. LA/Anaheim (NHL - 2014, NBA - 2010, MLB - 2002)
4. Chicago (MLB - 2016, NHL 2015, NBA - 1998)
5. Dallas (NBA - 2011, NHL - 1999, NFL - 1996)
just missed top 5: Bay Area (NBA - 2018, MLB - 2014, NFL -1995)
And finally the order for the 7 city/regions that have won in all 4 sports:
1. Boston (NFL - 2019, MLB - 2018, NHL - 2011, NBA - 2008)
2. Chicago (MLB - 2016, NHL 2015, NBA - 1998, NFL - 1986)
3. LA/Anaheim (NHL - 2014, NBA - 2010, MLB - 2002, NFL - 1984)
4. Baltimore/DC (NHL - 2018, NFL - 2013, MLB - 1983, NBA - 1978)
5. Philadelphia (NFL - 2018, MLB - 2008, NBA - 1983, NHL - 1975)
6. NY/NJ (NFL - 2012, MLB - 2009, NHL - 2003, NBA - 1970)
7. Detroit (NHL - 2008, NBA - 2004, MLB - 1984, NFL - 1957)
Draw your own conclusions...