@Chris_Bigpaws_Chambe E3D is not a superior design to the J-head.
Most issues like the picture up top ^ is related to lack of cooling on the PEEK stock, or skipping steps on unretract. E3Ds require active cooling to work for more than a few minutes. The friction between polar materials like PLA and ionic surfaces like metal makes for more force required to extrude on “all-metal” designs. The lack of a set-screw on the PTFE liner in the e3d also allows for ~0.5mm+ of play in the PTC connection which leaves a perfect location for plastic to get inside your heatbreak (retract will cause it to move). Removable nozzles (even when assembled correctly) also inevitably eventually get plastic caught in the threads at which point your hotend is toast. All metal is mostly just popular because it looks cool and is cheaper to mass produce.
J-heads are hands down more reliable and the preferred hotend for materials that don’t exceed the max operating temp. E3D’s ideal use case is simply for printing low viscosity/friction materials at high temperatures.
That, and I’ve never seen an e3d put out print quality like a jhead… even on my own machines.