First of all, sorry for my English, it’s not my native language.
Well, I did not expect to get spanked here!
Short answer : that’s how I work.
Long answer : I shoot real estate professionnally. Last assignment was a building with 6 flats in Paris (They’re called Aparthotels here), and between 2 to 6 rooms per flat. I shoot bracketed, merge in Photomatix pro, import into Lightroom, edit in DXO and import back into LR. I create at least 4 folders per “unit” (flats in that case) : brackets, Photomatix edits (date of capture erased by Photomatix), selection, export to" client folder".
At some point, I need to do some checking : e.g. select all bracketed pictures (950 in that case) to check if one (or more is missing or not), compare the white balance of all the pictures for the client, select all those shots to group into a single file for WeTransfer, compare the images of the bedrooms, the lounges,etc…
This is where the ability to select multiple folders (no matter the level) is a great feature I could not work without.
Albums, collections do not work for me because files cannot be edited.
Well, I do my best.
Thanks for providing an answer and pieces of advice.