I haven't ran into any snootiness at one LBS, very nice head mechanic and sales staff, but it was all modern stock. I walked in to have a Maillard freewheel removed from an old 82 cruiser wheel. I wanted to save the vintage high flange hub and UKAI rim.
The young guy couldn't figure out the freewheel as he was expecting it to remove like a cassette. He then tried to fit a Shimano Octalink BBB remover into the freewheel! I interrupted him by saying "That isn't going to work!" The head mechanic came over after hearing me and verified that they aren't equipped to handle such older parts. Gave me a few places to try as recommendations. He was about my age and could still relate to brands like UKAI, Sakae Ringyo, Maillard.
Last time I visited them for a Shimano recall issue, they downsized and shut their BMX store and inventory was greatly reduced, not doing too well.

I've had good friendly service at two shops in the metro area.....Junction Cycles in Apache Junction had the old french remover tool to handle my Maillard freewheel. And I found a nice old style display stand (that only fits older crank arms, not CF cranks), and new road saddle in his parts bin for $5 ea. Shop seems to be doing well.

The other is a little shop in Guadalupe, run by a husband and wife team. Very friendly, low prices, old bike shop atmosphere. I found the place during their annual bike swap meet. I've found great deals in their parts bins for $3-5 a piece, sometimes that old C&V hub or derailleur.
I try to stop in whenever I'm driving by to check out what's new in the bins.
As I do all of my wrenching, I rarely require the services of a LBS. But will buy consumables from them whenever I can instead of Walmart, etc.