There's one thing about BBRef.
ORtg and DRtg numbers on player profile pages are estimations of how many points they would produce or allow if they had those numbers across 100 possessions.
You need to check on/off section on team pages to see +/- driven numbers.
https://www.basketball-reference.com/teams/PHO/1999/on-off/The Suns had 105.4 ORtg and 101.5 DRtg with Kidd in 1998-99 season.
https://www.basketball-reference.com/teams/NJN/2003/on-off/The Nets had 106.4 ORtg and 97.9 DRtg with Kidd in 2002-03 season.
According to NBA.com;
In 1998-99, the Suns had 103.9 ORtg, with Kidd 105.3 and without Kidd 95.6 (+9.7 on/off difference) while the league average was 100.4.
In 2002-03, the Nets had 102.1 ORtg, with Kidd 104.7 and without Kidd 94.0 (+10.7 on/off difference) while the league average was 102.2.
Doctor MJ wrote:Note that while the relative ORtg is elite, the Suns were a more effective offense the previous year.
More over, the Suns would never run a better offense than they do in ‘97-98, and Kidd was not known for leading elite offenses after that.
I think you might say that ‘98-99 was Kidd’s best offensive season because the rest of the league wasn’t playing it’s beat.
I think we should also care for how his teams fell of a cliff on offense without him on the court.
In 2001-02 season, the Nets had a drop off by 8.6 ORtg when Kidd sat out. In the next season, it was 11.9.