"Sendy is without a doubt one of the worst written pieces of software I’ve ever had the displeasure of (a) supporting in product And (b) having to patch."

So you're saying you've never worked with Magento?

My thoughts exactly. Sometimes I think I hate Magento for being so overly complex, slow, resource-intensive, and feature-poor yet bloat-rich that only Adobe could be interested in it. Then I think of the poor people paying me to maintain and write extensions for it.

Does magento have any kind of code reuse, at all? Does it use classes to encapsulate logic and data? Does it use any kind of separation of logic and display?

If it has any one of those things it’s already better than Sendy. Sendy literally (and I mean literally not figuratively) looks like someone used stack overflow and copy/paste instead of any kind of education or experience writing code.

I didn't carefully analyze the code base but in my mind it's a victory if I can skim code in an unfamiliar code base / language and within a couple of minutes figure out a problem (not a problem with the code, but how I was using it).

Did you run into bugs with it that required patching? I haven't to my knowledge.

It doesn’t support (and yes I asked the author, he refused to add support) tls connections to the database (despite that being a ~2 line change when the dB handle is opened) - because the code is a metric fuck ton of copy pasted code (ie the same exact code copy and pasted in dozens of files) patching it to support tls means we have a non trivial system in place to patch the code.

It also tries to use a MySQL database as a queue/cache which is (predictably) terrible at larger volumes when you have eg a db cluster tuned for durability rather than raw throughput.

Can you elaborate on what makes it that bad? Some snippets of code, or egregious bug reports to satisfy my curiosity. Otherwise, it feels like bad-mouthing software.

For example the db connection logic is about a dozen or so lines. Those same lines are copy pasted into dozens and dozens of files. The same goes for other logic.

Want to fix a piece of logic (ie add tls support to the db connection)? Well you have a couple of dozen files to make the same change in.

And no i can’t link to it because it’s proprietary, and the really ridiculously bad code is even “obfuscated”, in a manner.