Agree not much between the DE-5000 and over $1K, except the Tonghui TH2830 which may be found for ~$900, we got ours for $850 a few years ago.
One must remember that the above $1K is bench LCR meter territory and these bench meters have many features lacking in the handhelds. Things like very high current levels up to 67ma for the TH2830 (100ma for the Hioki IM3536), selectable test Voltage and Current levels, selectable drive output impedances, DUT component binning, DC voltage and current DUT bias, frequency ranges below 50Hz (IM3534 IM3536 is 4Hz) usually with 1Hz resolution, higher frequency ranges (IM3536 is 8MHz) also with fine resolution, bigger displays with more information, external interfaces, DUT graphing capability and so on. Also the available precision DUT fixtures available, some of which have been cloned and not expensive, the SMD fixtures are an example.
The design of the quality bench type LCR meters is different as well, they utilize DDS created DUT waveforms and utilize high resolution ADCs (some have 24 bit SD ADCs that are common to lower end 5.5 and 6.5 DMMs) and have 5~6 digit resolution, and high BW and power level drive channels capable of driving 50~100ma DUT currents.
The handheld and bench LCR meters are like comparing a handheld and bench DMM, not exactly the same same features, resolution, accuracy and so on. One wouldn't use a handheld DMM to measure/characterize a Vishay precision resistor, nor a LM399 or LTZ1000, but would use such for troubleshooting in circuit, measuring the Mains lines and "seeing" if a 1K resistor is 1K or 10K (still can't read the color codes!!).
Also, should mention the quality bench LCR meters higher DUT excitation currents allow Resistance measurement ranges below the ranges on popular high resolution DMMs like the KS34465A, where the lowest range is 100 ohms.
Anyway, each type LCR meter has their place like the mentioned DMMs, and why we have and use both types.
Best,