Are there any known reasons for the time it's taking for wallets to update their software in order prevent all these problems and confusions related to segwit? I was considering updating to segwit as well, but I'm delaying this step because I would like to use electrum, and from what I've read they use the bech32 addresses, but they seem to be the only ones doing it (maybe there are more, but definitely not the majority).

I heard that coinbase, an exchange that I use when I need to cash out some coins, is finally going to update to segwit. I have no idea what type of addresses they will be using. But since they are updating to segwit, does this mean that even if they use the P2SH I will be able to make transfer to them if I use the bech32 addresses from electrum?