Apart from not knowing NodeJS and the relative difficulty of hosting options, another reason I've hesitated to get started with NodeJS is that it seems the vast majority of issues with Wappler which crop up here relate to NodeJS rather than PHP.
I think this is inevitable given the integration of NodeJS is so new to Wappler, but perhaps it's not so much of an issue now.
Another concern I have, related to hosting generally, is stability and robustness. For my customers, reliability is by a long away the most important thing (this is in relation to applications I develop generally, not specifically websites). I have no doubt that software developed with NodeJS can be just as robust as PHP, but perhaps as developers and others involved may be relatively less experienced with NodeJS, this may not always be the case. Eg there have been a number of threads about NodeJS having to be restarted - again, no doubt an issue which would disappear with experience. Comments like the one below I find alarming. When George says 'only', it could 'only' be a matter of costing a customer thousands of pounds and/or losing hundreds of hours of work.
I'm sure these fears are essentially based on ignorance. Before long I hope to become less fearful as I gain more knowledge, but I hope PHP will remain in Wappler for a long time.