Comment by the_fall

Meh. The room-temperature endurance of modern EEPROMs (e.g., ST M95256) is something like 4 million cycles. If you use a simple ring buffer (reset on overflow, otherwise just appending values), you only need to overwrite a cell once every 32k ticks, which gives you a theoretical run time of 250,000 years with every-minute updates or 4,100 years with every-second updates.