Should I buy Samsung Galaxy Note 4 in 2018?

1. Is it genuinely best to buy it this year? (Because, its OS is old so there might be problems in the updates, like some part or the whole mobile not working properly or some apps not responding properly to the updates etc.)

2. Furthermore, after warranty period, will it be easy to get it serviced or replace its parts if required? (Because it is an old model and still I didn't get the info after my searches whether it is discontinued or not. Because, if it is discontinued then it might be...

Should I buy Samsung Galaxy Note 4 in 2018?

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