Everybody wants the flamethrower. These guys are throwing harder than ever. Seems every team has multiple guys now that can hit 100mph. It used to be rare. Which leads to multiple things. There are more Tommy John surgeries now than ever before. And even when they are healthy, they burn out faster. Over a game and over a career.
The pitchers like Greg Maddux where control and pinpoint accuracy are a thing of the past. Guys like Bert Blyleven. Dude had more complete games in a season than most guys have in a career now. And not one Tommy John surgery. He didn't start having arm trouble until the latter part of his career. And those were shoulder issues.
Nolan Ryan never had Tommy John surgery. And he is probably the hardest throwing guy of them all. But the big difference in him and his era was they threw huge amounts of innings from the start. They weren't babied and allowed their arm to build the strength to throw deep into games.