@georgewaini I know people in the comments are saying there are no tax advantages to the 3b pillar, but depending on your canton they do exist. AFAIK, Geneva has 2.2k CHF deduction if you have a pillar 2 pension, 4.4k CHF in not contributing to either the pillar 2 or pillar 3a.
I would say do your research, if you would like a place where you can do "forced savings" by having the monthly amount be taken out of your account + possible tax deductions (esp if you know you're going to be paying wealth tax) + insurance, it might be worth it
ofc in the 3b the returns will be lower since usually a good percentage will be in "guaranteed return instruments" (around 20% maybe??) + plus bank/insurance fees, compared to just setting it in an index fund in IBKR or somewhere else.