Didn't they get rid of him for refusing to play to a metronome or something like that?
Not quite.
Smith had developed his behind the beat feel with Ross Valory on the previous 4 Journey studio albums, which had propelled the band to superstardom, so naturally, that's what Steve and Ross were ready to deliver again.
But Cain had started writing with drum machines and giving Perry demos with perfect drum machine tracks. Perry had done his solo album with a studio drummer who had played to a click, and Perry wanted that more perfect time, with also a more on top of the bear eel.
So partway through the recording of the album Raised on Radio, Perry had Smith and Ross Valory fired because he wanted to change the feel from what Smith and Valory usually did to a more studio drummer-to-a-click feel. Johnathan Cain and Neal Schol went along because they had promised Steve Perry could have full control in the studio.
It wasn't that Steve Smith refused to use a metronome, it's just he had never done it before and wasn't expecting or prepared to be told to completely change his sound and change what had been working.
Though in an odd twist, Journey manager Herbie Herbert was so mad at Perry over firing Smith, that he kept Smith on the payroll for a while.
Decades later Perry would say if he could do it all over again, he wouldn't have fired Smith and Valory.
After getting canned from Journey, Bryan Admas hired Steve Smith. Smith only appeared on one track (the massive hit "Heaven") because Smith got fired from the rest of the album due to his still not having experience playing to click. After that. Smith said he woodshedded on playing to a click, which, of course, led him to appear on countless albums since them.
The point being Journey wasn't happy with any of the many worthy drummers who auditioned and were fully capable of doing the gig., not because of money, not because the drummers weren't skilled or weren't qualified, but because they had no clear vision on what they were trying to accomplish in replacing Smith.