nice!
if I try this (taking out the area because I want them all, and taking out the entity_dict because it does not seem to do anything in the output?):
{% set ns = namespace(device_dict=dict()) %}
{% for entity in integration_entities('zwave_js') %}
{% set name = entity | device_id | device_attr('name') %}
{% set id1, id2 = entity | device_id | device_attr('identifiers') %}
{% set node = id1[1].split('-')[1] %}
{% set ns.device_dict = dict.from_keys([(name, node)], **ns.device_dict) %}
{% endfor %}
|Device||Z-Wave ID|
|:----|--|:----|
{% for item in ns.device_dict -%}
|{{ item
}}||{{ ns.device_dict[item] }}|
{% endfor %}
I only get a handful of devices.
also, when I try the device_attr('name_by_user') the following error is displayed
TypeError: keywords must be strings
edit
see post below: the list is abridged because unique is used on the device names.
the type error was caused by the fact 2 of my devices had no name_by_user set… Ive fixed that, and now the Markdown is beautiful in a, sorted, table
No more use of Zip though 
- type: custom:hui-element
card_type: markdown
card_mod: !include /config/dashboard/card_mods/box_margin_0_16_16_16_markdown.yaml
content: >
{% set ns = namespace(device_dict=dict()) %}
{% for entity in integration_entities('zwave_js') %}
{% set name = entity|device_id|device_attr('name_by_user') %}
{% set id1, id2 = entity|device_id|device_attr('identifiers') %}
{% set node = id1[1].split('-')[1] %}
{% set ns.device_dict = dict.from_keys([(name,node)], **ns.device_dict) %}
{% endfor %}
|Device||Z-Wave ID|
|:----|--|:----|
{% for item in ns.device_dict|sort -%}
|{{item}}||{{ns.device_dict[item]}}|
{% endfor %}
