gchapman 
gchapman 
It was looking interesting until I got to the price.
I got to the price.
If it's only about AVRs at this point my recommendation for a full-fledged programmer / debugger simply to use the nEDBG interface of a Curiosity Nano board (~ 16 €) 
Belonging to ICE4 the new MPLAB-X V6:
https://www.microchip.com/en-us/tools-resources/develop/mplab-x-ide
MPLAB ICE 4 in-circuit emulator connects to the target using a high-speed 40-pin rugged edge rate cable assembly
What the .... ?
It's not small.
gchapman MPLAB REAL ICE is EOL though a relative few EOL distributors have stock.
The ones at Microchip Technology are keen on amortization.
MPLAB REAL ICE IN-CIRCUIT EMULATOR | Microchip Technology
edit :
Our fav chip maker stock | AVR Freaks
gchapman Atmel AVR ONE! (AVR32 instruction trace) have a 38-pin Mictor (bench logic analyzers)
Similar for PIC32 (MIPS) instruction trace.
Auxiliary (AUX) Physical (including JTAG) | AVR ONE!
Using the JTAG Mictor Connector | AVR ONE!
MPLAB ICE 4 In-Circuit Emulator User's Guide
[bottom of page 64]
5.6 Instruction Trace for PIC32M MCUs
...
awneil 
If it's only about AVRs at this point my recommendation for a full-fledged programmer / debugger simply to use the nEDBG interface of a Curiosity Nano board (~ 16 €)
The MPLAB® ICE 4 certainly gives you a lot more features - but whether that's really worth 100 times 
the price is another question ...
gchapman The MPLAB® ICE 4 certainly gives you a lot more features - but whether that's really worth 100 times
Send me one and I'll answer your question!!
Money is relative.
Money is absolute; value is relative. 
They're definitely not aiming for the hobbyist market.
gchapman gchapman press release :
Chandler, Arizona
January 4, 2022
Microchip’s MPLAB ICE 4 In-Circuit Emulator is a full emulation, programming and debugging system featuring wireless connectivity, power debugging and real-time code profiling using trace
...
Ethernet connectivity provides remote debugging for applications which are monitored over long distance. Further, Wi-Fi connectivity is excellent for providing isolation from environmental conditions such as high-voltage motor control applications or floating systems with no ground loop.
MPLAB ICE 4’s powerful hardware integrates with MPLAB X CI/CD setup over Ethernet creating an effective combination for hardware in the loop. Designers can use the CI/CD wizard to set up Jenkins and Docker on the latest version of MPLAB X IDE v6.00.
It is equipped with power debugging capabilities to monitor how power consumption correlates to code using MPLAB Data Visualizer. Additionally, embedded engineers can extract more from the code by using two independent current-sensing channels with varying resolutions for measuring and optimizing the power consumption of a design.
Engineers can reduce development time using MPLAB ICE 4 In-Circuit Emulator’s advanced features supporting many widely used instrumentation and instruction trace capabilities. ICE 4’s several debug and programming interfaces and options for target connections using adapter boards further help to reduce development time.
...
For more information about the MPLAB ICE 4 In-Circuit Emulator visit Microchip’s website.
Pricing and Availability
The MPLAB ICE 4 In-Circuit Emulator DV244140 is available today for $1,799 and includes one accessory kit. Additional accessory kits are available separately. Microchip’s MPLAB ICE 4 Accessory Kit AC244140 is available for $350. To purchase products mentioned here, visit our purchasing portal or contact a Microchip authorized distributor. For additional information, contact any Microchip sales representative or authorized worldwide distributor.
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gchapman 40-pin connector briefly described at 2:19 in Overview of the MPLAB® ICE 4 - YouTube (8m36s, 6:20 for trace)
edit :
Target Connection Pinout | MPLAB ICE 4 In-Circuit Emulator User's Guide
