fix: adapter features messaging

.changeset/long-months-burn.md

@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Changes messages logged when using unsupported, deprecated or experimental adapter features for clarity

packages/astro/src/integrations/features-validation.ts

@@ -124,20 +124,20 @@ function validateSupportKind(
 }
 
 function featureIsUnsupported(adapterName: string, logger: Logger, featureName: string) {
-	logger.error('config', `The feature "${featureName}" is not supported (used by ${adapterName}).`);
+	logger.error('config', `The adapter ${adapterName} doesn't currently support the feature "${featureName}".`);
 }
 
 function featureIsExperimental(adapterName: string, logger: Logger, featureName: string) {
 	logger.warn(
 		'config',
-		`The feature "${featureName}" is experimental and subject to change (used by ${adapterName}).`,
+		`The adapter ${adapterName} provides experimental support for "${featureName}". You may experience issues or breaking changes until this feature is fully supported by the adapter.`,
 	);
 }
 
 function featureIsDeprecated(adapterName: string, logger: Logger, featureName: string) {
 	logger.warn(
 		'config',
-		`The feature "${featureName}" is deprecated and will be removed in the future (used by ${adapterName}).`,
+		`The adapter ${adapterName} has deprecated its support for "${featureName}", and future compatibility is not guaranteed. The adapter may completely remove support for this feature without warning.`,
 	);
 }