I prefer electrum cause i have a weak memory and already lost a ledger one time,but is it really safe ?
The amount of Bitcoins you hold in Electrum doesn't really matter. A hardware wallet is better because it is designed to be secure enough from most attacks.
does something like that hacking of the fake update links showing for people with old electrum clients can happen again ?
That is a social engineering attack. There is no telling of how zero-day exploits or just exploits in general can pop up. There are potential attack vectors and you can't possibly guard against all of them. An airgapped wallet should protect against most but hardware wallet is quite dummy-proof and gives sufficient protection against attacks while maintaining the convenience factors.