What technology is used too little in Star Trek?

Motre than once, people in Star Trek used some technology in one episode and then forgotten it. Or a function of a technology. Phasers firing wide beams would be, for example, very useful in the Domionion War, if only to sweep for shorunded Jem'Hadar. Or what abond these transpoders KLirk and Spock used once, and they were nver used again? And other thing like that. What technology do you think was used too little in Star trek?