I’ve been arguing t-addresses are hugely problematic for years Anti-fud Campaign; T Addresses - #12 by GGuy.
There are also many technical reasons that make deprecating t-addresses harder the longer we delay it. Unified Addresses Composition - #14 by GGuy
If I cross my fingers 
I think within 24months, hopefully sooner, Zcash should be at a point where we should formalise t-address deprecation, as a ZIP. I’ll become much louder on the issue when we approach that point. Within 36months, if not deprecated yet, I believe many of us might feel deep regret not having done it sooner. Unfortunately I’m merely a mortal so my future predictions are barely as good as a coin toss 
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For those that haven’t made up their mind on t-addresses yet I believe it’s almost certain we will reach a point where the burden of t-addresses will objectively outweighs any benefits. Currently the benefit/burden of t-addresses is case-by-case depending on the user, their country, and their usecase. Deprecating any widely used features is hard so I think it’s important we formalize this transition sooner than later otherwise it’s all going to catch-up to us very quickly. I believe any of the valid usecases left for t-addresses in the future can be managed off the Zcash chain (e.g. a zec or other token on another chain/dex/etc). @Tsupportisharmful I appreciate you championing this issue as I believe if we don’t come to a consensus on deprecating t-addresses soon it will become a heavy burden politically, technically, and for our users 
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