https://xrpscan.com/account/r4aZnNySG8s7kPSxHKZJoTL9VnEzMqJ4UE ... So way back when I made a personalized wallet on that old ripple platform that doesn't exist anymore as per what my emails show. Since now this is a custodial entity an all that jazz how do I get my 1700 XRP out of a wallet address I no longer have access to thanks to advancements in technology?
Custodial means the company take care of the address and you will have no access to its asset if they decided to cut some access that's why people in this forum highly advised to use self custody wallet.
The only way is to contact them, who knows if they still allow withdrawal. Try to find their explanation about the shutdown of their services maybe you'd find some email to contact to.