They’ve done that sort of thing a couple of times, but it’s always been a dirty hack that happened in an emergency. For example, in the TNG episode “Relics,” Scotty put himself effectively in stasis for 70 years by setting the buffer to continually refresh itself like DRAM, and in the DS9 episode “Our Man Bashir” there was a transporter malfunction and they had to wipe the memory of almost the whole station in order to find enough space to store the command crew’s neural patterns, overwriting Bashir’s holosuite program so the crew’s likenesses replaced the characters.
They’ve done that sort of thing a couple of times, but it’s always been a dirty hack that happened in an emergency. For example, in the TNG episode “Relics,” Scotty put himself effectively in stasis for 70 years by setting the buffer to continually refresh itself like DRAM, and in the DS9 episode “Our Man Bashir” there was a transporter malfunction and they had to wipe the memory of almost the whole station in order to find enough space to store the command crew’s neural patterns, overwriting Bashir’s holosuite program so the crew’s likenesses replaced the characters.