I like different instruments. Hearing something you don't normally hear in a song adds to the sound.
The harmonica isn't new, but it is something that's not in every band out there. Mojo Blues Band has a harmonica player in their band regularly. Their music is just snappy! They are not a US band. The founders of the band played before 1977 in clubs of Vienna. Being the only blues band in Vienna they were often booked as backing band for blues artists who were touring in Austria. They have a jazz, and blues sound. They have 18 albums, so certainly not new, but new to me.
This next one really features their harmonica player:
Visit the Mojo Blues Band website.
Do you like listening to the blues?