We actually have statistics over the last 90 days for this overall. The table is as of 2023-02-08 at about 01:00 UTC.

| Site                    | Migrations|Rejection percentage|
| ----------------------- | ----------|--------------------|
| Webapps                 | 72        | 29%                |
| Stack Overflow          | 67        | 44%                |   
| Android                 | 34        | 8%                 |
| Ask Different           | 21        | 9%                 |
| Raspberry Pi            | 3         | 0%                 |
| DBA                     | 3         | 0%                 |
| Serverfault             | 3         | 33%                |
| Webmasters              | 2         | 0%                 |
| Wordpress               | 2         | 0%                 |
| Hardware Recommendations| 2         | 0%                 |
| Retrocomputing          | 2         | 0%                 |
| Code Review             | 1         | 100%               |
| Emacs                   | 1         | 0%                 |
| Gaming                  | 1         | 0%                 |
| Vi                      | 1         | 0%                 |
| Sharepoint              | 1         | 0%                 |
| Software Recommendations| 1         | 0%                 |
| Security                | 1         | 0%                 |

In theory we could dig further but *unfortunately*, there's no 'better' canned statistics + quite a lot of questions are deleted on their target sites. That said, we migrate pretty sparingly all in all. Its generally a good thing to keep in mind, and migrating *great* things in the 'wrong' place is a noble goal, but it isn't exactly a huge problem.