Most of them. Static RAM was (and still is) more expensive since it needs more transistors and chip area per bit stored. It it, however, also much easier to interface since it doesn't need refresh circuitry. This is why you see it in the earliest designs, and also why you see it in so many hobbyist designs. It's also why you tend to see it in the video systems even if the rest of the machine uses DRAM. Dealing with DRAM refresh while reading out the whole memory chip sequentially (while also having a second port to read/write from the CPU!) starts making things very complicated.
But still DRAM is what you would use for a "real" system. Wozniak's design for the Apple II used a clever hack where the system actually runs at 2 MHz with an effective CPU rate of 1 MHz. Any read from a DRAM row will refresh the entire row. Approximately every other cycle the video system steps incrementally through memory, refreshing as it goes.
But still DRAM is what you would use for a "real" system. Wozniak's design for the Apple II used a clever hack where the system actually runs at 2 MHz with an effective CPU rate of 1 MHz. Any read from a DRAM row will refresh the entire row. Approximately every other cycle the video system steps incrementally through memory, refreshing as it goes.