Wim recomend set up once a year. Extreme perhaps.
But given how new suspension takes a month or two to settle. Then there may be a couple of years of stability, then a gradual degrading as springs and bushes age on any car. And add in the owners awareness and how these jobs have a tendency to lose priority it's probably not a bad mentality to have.
While its arguable if set up is necessary after wb change, although not in my book, it's a certainty the rest of the suspension on the car will have degraded and lost its original position since it was last set.
Now is the perfect time to do ANY related work on the steering and suspension.
A thorough check over.
Replace any steering or suspension parts.
Set up.
Fit new tyres.
Relax knowing the car will be good for a fair while, and won't rip the arse out if the tyres in short order.
(if fitting new springs allow a month or two before set up to allow the new suspension to settle

Preferably not on new tyres though. Leave the old ones on until the process is complete if pos.)