Thanks for a quick and comprehensive response. I’m reassured so will keep on experimenting and no doubt crashing the dev server again and again!
Andrew
This would get my vote.
Yes, the dev server itself can crash on particularly nasty code 
Unlike uibuilder and Node-RED of course which are far more robust! 
Feel free to contribute some code
I'd love to but my old brain isn't that agile anymore and it's already full of projects...at least that was the last report it gave me...or do I just think that happened? 
