Depends which MY you have, what you want to change and/or what you dislike about its' current bias/balance.

Me? I have a MY03 AP1, which is super rear-bias (tail-happy, more oversteer, etc.) because of its' big RSB and thin FSB (as well as stiffer springs in rear & softer in front).

I wanted a more neutral, kid friendly, handling car that I could push harder with less worry about spinning out. So, I changed sway-bars to a fatter MY00/01 FSB and thinner MY06+ RSB (similar swaybars of a CR).
And, this absolutely met my goals; as it made my car feel/handle more neutral and more front-bias. After the install/swap, it felt much more grippy, planted and safer to drive at the limits.
Before, the rear felt very floaty, light & twitchy at the limits (always needing more focus, alertness and attentiveness).

 

Note:when Honda adjusted Arb rate spring rate are changed also for a reason

 

But those reasons might not align with some peoples preferences. Hence customization.

Some foolishly customize without intent. Change stuff randomly without clear understanding of actual impact.

Others do it wisely. Recognize and analyze what they don't like. Research and determine what changes in what direction will accomplish their goal. Then mod.