I have a question about  wallets which use different services to send/recieve bitcoin.  No client except the bitcoin-core client uses the full chain downloaded.

Will coin AT REST be safe in all these wallets which store the private keys on your device (not web based -etc).

Jaxx
Copay
mycelium
Electrum
multibit classic
multibit HD
trezor HD
etc,

For how long will they be safe?  Will any of these wallets, when a coin is spent, be using a different version?  Is there any timeline or statements from each of these wallets on their chain usage?  Copay uses Bitpay, etc.  maybe could someone put together a comprehensive list of which networks and what they will adopt?  

some info on electrum.
http://docs.electrum.org/en/latest/hardfork.html

If you load any other wallet besides the core client, just to check your balance, will this load associate your coins with the wallet's chain services now and all your coins will be now activated on that specific fork?

Any help or input would be great peace of mind!  thz