Malaysian doesn't switch network because they are smart. Just look at our 5g indoor coverage. If you switch and there is no Umobile/Yes 4g, you cannot even make and receive calls.
If you stay in Klang valley/KL then it make sense to use Yes.

Based on this response, Umobile seems to have the best balance between coverage and affordability, so what is Malaysian problem in not switching?

What is the point of having the biggest coverage when it is useless when we needed them the most?

Also, isn't it ironic that MNOs can subscribe to CelcomDigi 2G network as MOCN yet there is no problem? I thought CelcomDigi monopolize the 2G must be bad in theory right yet it seems a couple decades later, the MNOs seems fine?

What makes CelcomDigi 2G MOCN difference from DNB 5G MOCN?

I mean, during earlier 2G and 4G implementation, I'm sure the indoor coverage is bad as well but that is because it still new, decades later, 5G will follow suit as well like how 3G and 4G have deep coverage indoor inside currently.