Top Enhancements

1. Dynamic provider configuration assignment #300 - 269 👍
2. Support OCI registries for provider and module distribution. #308 - 104 👍
3. Support OpenTofu in the VS Code Language Server #970 - 86 👍
4. Direct support for conditional single-instance resources #1306 - 85 👍
5. tofu plan -light #1703 - 81 👍
6. Unlocking Terraform's S3 Backend: Going DynamoDB-Free #599 - 61 👍
7. Use variables in lifecycle attributes such as prevent_destroy or ignore_changes #1329 - 59 👍
8. [State Encryption] Key providers (Azure Key Vault) #1171 - 54 👍
9. Allow Variable Validation Conditions to Refer to Other Variables #1336 - 49 👍
10. Add support for lifecycle meta-argument in modules #304 - 48 👍
11. CDK compatibility commitment #1335 - 44 👍
12. Support Dependabot for update automation #1236 - 42 👍
13. Allow variables to be marked as deprecated to communicate variable removal to module consumers #1005 - 39 👍
14. Add workspaces support to HTTP backend #317 - 34 👍
15. Allow the default registry used by OpenTofu to be configurable #618 - 28 👍
16. Allow to inspect submodule resources in OpenTofu console #1534 - 28 👍
17. Nullable Data Source #1760 - 27 👍
18. Conditionally load tfvars/tf file based on Workspace #1053 - 27 👍
19. Support locking modules #586 - 24 👍
20. Implement TF_MODULE_CACHE_DIR #1199 - 22 👍

Top Bugs

1. Excessive DeepCopy usage in case of using remote state backend #1580 - 5 👍
2. Finally allow force-unlock for remote http backend #2027 - 2 👍

Top RFCs

1. Implement the stack concept #931 - 75 👍
2. Backends as plugins #382 - 38 👍
3. Don't make redundant copies of the same module package. #1086 - 37 👍
4. Make tofu fmt enforce all OpenTofu Style Conventions #1079 - 30 👍
5. Support keyless provider signing/verification using Sigstore #307 - 30 👍
6. Support locking modules #586 - 24 👍
7. OCI Support For Modules and Providers #1672 - 15 👍
8. Add OpenBao as a remote state store #907 - 12 👍
9. Introducing OPENTOFU_ environment variables #641 - 10 👍
10. Generate SLSA provenance for OpenTF release builds #315 - 8 👍
11. Add force-lock command #1124 - 8 👍
12. Leverage DynamoDB TTLs in State Locks #1222 - 6 👍
13. RFC: Unclear Schema Coercion #884 - 4 👍
14. RFC: Dynamic Provider Instances and Instance Assignment #2088 - 3 👍
15. RFC: Tofu Version Compatibility #1716 - 3 👍