Tim' voice changed?!

I have a theory about why Tim sounds different.
Yesterday I was at the concert, and as soon as the band started playing NOD, he sounded exactly like he did on Ricochet. When I first heard the album, I honestly thought his vocals had been filtered. But now I think I was wrong. His voice has probably just changed over the years, which makes a lot more sense.
Did anyone else notice this, or am I just freaking out? 🤣 I mean, you can’t expect someone to sound exactly the same after more than two decades of screaming and hitting those high notes.