I use 5 bitcoin wallets. just don't want to put all of my eggs in one container.
it's too much. there will be no wallet hack into your account if you use a lot of security. useless to use a lot of wallets. but no authentication
Yes, lot of wallets (some times address) may end up in mess. Practical approach must be, use one or two wallet types for some time like 3 or 6 months. Then make them cold storage and move to different wallet type.
These all for the bitcoiners who want to save bitcoins for years.