>>9773612That's simply not the case, the benefit of space based over ground based varies with task. For example with Hubble today the 8-10 meter ground based telescopes are more sensitive in doing spectroscopy, HST however is more sensitive in imaging.
Move forward to the future with JWST and the 20-40 meter class telescopes and the differences will change. The ground based telescopes will have much, much higher angular resolution, the European ELT will probably max out at 10 times the resolution of JWST. This is because they are larger and can now overcome the atmosphere with adaptive optics over small fields. They will also have higher resolution spectroscopy and be more sensitive at medium resolution. JWST will have other benefits such as very deep imaging, long wavelength performance and high photometric stability.
Ground based telescopes can also be equipped with instruments too complex for space such as extreme high contrast exoplanet cameras and exoplanet finding spectrographs.
The disadvantages of space are that it's extremely expensive, so you get a much smaller telescope. You get much more bang for your buck on the ground but you have to go to space for some things. JWST will compliment the ground based ELTs, and vice versa.
