All eras. As long as it has a guitar in it.
But you can't have any discussion about the "blues" without a nod to the original:
Tommy Johnson (January 1896 – November 1, 1956)
and a variation with some simplifications and some extra embellishments:
Robert Leroy Johnson (May 8, 1911 – August 16, 1938)
and distorted with an electric guitar
McKinley Morganfield "Muddy Waters" (April 4, 1913 – April 30, 1983)
then blown up and popularized
B. B. King (September 16, 1925 – May 14, 2015)
and rock-and-rolled
Led Zeppelin (James Patrick Page (born 9 January 1944))
even with orchestral accompaniment
Pink Floyd (David Jon Gilmour (born 6 March 1946))
Provided to YouTube by Pink FloydComfortably Numb · Pink FloydThe Wall℗ Pink Floyd RecordsReleased on: 1979-11-30Auto-generated by YouTube.
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then kicked back down south to near where it started
Stephen Ray Vaughan (October 3, 1954 – August 27, 1990)
Make sure to check out my new solo jam over I Shot The Sheriff by Eric Clapton: https://www.youtube.com/watch?v=h3eSw4dBnaY&t=86s
www.youtube.com
and back up north again
Joe Bonamassa and Eric Gales
Filmed by Linda Moke on the Keeping Blues Alive Mediterranean Cruise
www.youtube.com
Is the art fading away or is it just changing? There's a lot of other R&B
like stuff out there that borrows from these.