SaS products that support custom code are already basically like that. Salesforce has multiple shockingly large documents on all the limits they enforce: https:

SaS products that support custom code are already basically like that. Salesforce has multiple shockingly large documents on all the limits they enforce: https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/apex_gov_limits.htm https://developer.salesforce.com/docs/atlas.en-us.apexcode.m... That does mean it's hard to break the app, but it also means people quite frequently run into those limits.