Why the change?

I am wondering why SIA is reverting to the walk-in interview for cabin crew. The walk-in has ceased and in its place SIA has introduced the online interview for the past few years. I am referring to the interview in Singapore.

Is the above change due to cost or what? Covid cases is still very high. Will the large crowd at the interview registration cause the Covid cases to escalate? No one will know the answer until days or weeks after the interview which is to be held at MBS on 30 July. Let's keep fingers crossed.