tripalreno4, I used Sibelius starting from version 2(!). Once Dorico became mature I switched and couldn’t think of going back. It’s a little more complex sometimes, but there’s a logic behind every feature, since it’s been re-thought from ground up. On a broader level, I feel more in control of my scores with Dorico than with Sibelius, partly because of the multiple-flows-in-one-project paradigm. Sibelius, in retrospect, always felt a bit chaotic to me.
Sibelius’ future is likely one of minor incremental gains. The core “idea people” behind that software all departed and ended up creating Dorico.