PSoC1 is not obsolete as of now. Introducing new devices has been stopped. Some package options may be obsolete, mostly non-ROHS packages. You can still purchase many PSoC1 devices.
I also suggest you take a look at our PSoC Analog Co-Processor, which has SC blocks similar to PSoC1.
Yes, I did look at the Analog Co-Processor, but the UAB blocks that are the modern equivalent of the PSoC 1 SCBLOCK are not yet available to the public in Creator. I learned from the PSoC 4 forum that they are planned for release.
Since the PSoC 1 devices that fit in the PSoC 1 evaluation kit that is presently available are no longer available, it would be nice if the information was provided as to suitable alternatives e.g. surface mount equivalents and adapter boards to fit in the DIP sockets.