There are now 80 meter 10G RJ45 SFP+ modules, whats the tech behind those or downsides?

Its seems that several 3rd party optics providers (who also sell RJ45 SFP+ modules) recently started to sell 80 meters editions.

For a long time 30 meter was the upper limit due to power budget of a SFP+ slot (there were not enough of power to shoot a 10G signal 100 meters through a TP-cable with RJ45 interface which a builtin 10Gbase-T RJ45 can do).

Anyone in here who might have some info on how that suddently happended techwise (what kind of chip or technology suddently emerged to be able to increase the signal strength by 167% with the same power budget and standards as previously)?

Or for that matter does the new 80M RJ45 10G SFP+ modules have some kind of drawback compared to the 30M editions?

Assuming that a 30M module will speak to a 80M module as long as the total cable length in between is less than 30 meters... same as a 30M module can speak to a builtin 10Gbase-T RJ45 as long as the total length is less than 30 meter.