'Smack Is Back' is a long running news angle. It takes on new trends and forms now and again (Black Tar Heroin, Fentanyl-mix, P-Dope, Cheese, etc) and sometimes new regions of the globe dominate new areas of trade or take over once thoroughly dominated markets (NYC & Seattle/Portland used to be the mainstay of Golden Triangle white powder; the former now it is mainly Colombian brown powder with smaller bits of Golden Crescent base, Mexican brown powder & BTH, with Golden Triangle white powder bringing up the rear, the latter cities are almost entirely black tar heroin/BTH with smaller amounts of others trickling in, with very little Southeast Asian white).
Heroin has been back in 'style' in a sense since BTH and Colombian and to a lesser extent Mexican brown powder Heroin have made it into the same drug channels that opioid pill users tap into, and have made up markets that are highly accessible for white suburbanites.
Ecstasy, Ambien, Adderall, Mescaline extract, 2C-x and other RC's, Ketamine, etc may come and go as 'drugs of the minute' or of decade, but underneath Heroin is ever present as the drug of choice for lots of mind expanders trippers and internet RC guru's alike.
Junk has been around since it was called the Joy Plant and Morphine identified as GOM; it isn't going anywhere anytime soon.