exit() or Close() for the Palette to Completely Finish it in the Memory

Hi Experts,

I Have a Script that Only use three Palette's, to let user interact with indesign, i usually use :

exit();

to end the Main Script, but if i exit the script witout closing the other Palette's (one or two) they remain in front of the user!, they shouid use small close buttons to exit the palettes (its kind of options palette's) ,  ofcourse i can add simply close() button to each palette, but does that really clear memory rather than exit()?, i read Marc Autret Artilce in 2013 about that in the following link :

https://www.indiscripts.com/post/2013/12/indesign-scripting-forum-roundup-5#hd3sb2

but the article is old!, so are 2021 make any difference? i use indesign 2021, but the script maybe it will used on (cs6 or cc2018)  just wondering, shouid i care a lot? or just use close() mixed with exit() in the main palette ? and Thanks in advance