Which FPGA/CPLD dev-kit should I go for ?

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Where did you hear this? Do you mean older Cyclone devices? I don't think Cyclone is going anywhere. C10 just came out. Here's a board from Intel:

https://www.altera.com/products/boards_and_kits/dev-kits/altera/cyclone-10-lp-evaluation-kit.html

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Thank you, sstrell. So only the Cyclone I is to be discontinued.