Chris2303 mentioned:
More like have we surpassed practical limits in terms of thrust
No, that stage was reached in 1943 as reported here:
https://en.wikipedia.org/wiki/Junkers_Jumo_004
... with a time between overhauls of 50 hours being achieved.[8]
Later in 1943 the 004B version suffered turbine blade failures which were not understood by the Junkers team.
Jumo -:- thrust -:- weight
109-004B -:- 8.83 kN (1,984 lbf) -:- 745 kg (1,642 lb) 8,700 rpm
https://en.wikipedia.org/wiki/Willia...Specifications
Dry weight: less than 300 lb (140 kg)
Maximum thrust: max takeoff thrust 1500 lbf
Testimonials - Company - Williams International
The Williams FJ44-3AP engines ... and 5,000 hours between overhauls.
Thank god we realised when to stop in 1943 or goodness knows what might have happened?