Simple client query tool question
My question is - why do these features lack in so many Postgres editors?


What are you missing? You can do it all with psql[1] or PGAdmin III[2].

Take a look[3][4] how to customize psql to interact with our editor/environment.


  Postico for example has no easy save option - who does not save queries they write?


That's a good question. :P


  Is the way Postgres typically is used fundamentally different than other databases? I understand some are optimized for high throughput etc, but is my use (analyst) so very different than features developers would need?


IMHO the PostgreSQL community share a ideia of make a simple tool for each job. You can do all the job, but using each of this 'tiny' tools. 

Database vendors, like Microsoft and Oracle, always make a super tool with all options and probably call this small tools to help.

MSSQL it's a great database but, without the Management Studio, it's hard to work with. 


  Is it just because I'm relying on open source editors? Anyone have recommendations?


There's a few comercial options, like @Lauri already suggested, take a look at the wiki[5][6] for more options.

Hope it helps.

References:


https://www.postgresql.org/docs/current/static/app-psql.html
https://www.pgadmin.org/
http://www.craigkerstiens.com/2013/02/21/more-out-of-psql/
http://akorotkov.github.io/blog/2016/06/09/psql-graph/
https://wiki.postgresql.org/wiki/Community_Guide_to_PostgreSQL_GUI_Tools
https://wiki.postgresql.org/wiki/GUI_Database_Design_Tools