Are there any disadvantages of going for SQL server standard edition
instead of enterprise
The disadvantage is you can't use enterprise features, like AlwaysOn AG among others (see below). If you aren't going to use these features, then you don't need Enterprise generally speaking. The advantage is you'd save some money. Both are licensed per core, and enterprise costs more per core.... like 4X more than standard.
Here are features that come in Enterprise that don't come in Standard:
- Unlimited memory (max of OS)
- Online Page restore
- Online index rebuilds
- Mirrored backups
- Automatic tuning
- Transparent database encryption
- Parallel index operations
See the data sheets, and the full comparisons for the differences. Generally speaking, unless you really need those enterprise features, I'd would opt for standard for the HUGE cost savings.
Microsoft also has a guide to help you decide which one you need.