New poster question about Fly rods loops vs eyes

Can you answer an odd question for me please. I am looking to buy my
husband a new fly rod, he is really looking to replace the two he has
which have all rings along the 2 pieces but all the rods that I see for
sale seem to be loops not eyes . Last year I purchased him a fly rod
with loops which was not appreciated, he really wants to replace his
other "all eyes" rods. Is it the norm now for all fly rods to be made
this way? and what are the downsides?
thank You very much for taking the time to deal with this. I would hate
to make another expensive mistake.
Claire Owen
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Claire in Montréal France.