Re: Bitcoin for bandwidth limited users

Use of bitcoin client would be easier for him if all data expensive operations are done by third party client (for example my client) and his client would be able to verify found transactions and and them to his wallet.

that's what SPV clients, like electrum and multibit, does. they don't need you to download 70GB~ of data.

If the BTC electrum servers get taken down or offline or whatever then those who use it run the risk of losing their coins unless they have their private keys saved for their coins.

Anyone can run an Electrum severs[1] alongside their Bitcoin Core. The issue with doge electrum wallet was the lack of servers which is definitely not a problem with Bitcoin Electrum. People can set up their own nodes to connect to. You can also export the keys on Electrum if you need to; Wallet>Private Keys>Export.

[1] https://github.com/spesmilo/electrum-server

Just because people can set up their own don't mean they will. I'll reference the Doge electrum again for this instance. Users could have set up their own and kept it going but that wasn't the case and those that were counting on that were mistaken.